ランドリーサービスを頼みたいのですがって英語でなんて言うの？

"I would like to get some clothes washed and ironed.": Washing and ironing are part of the laundry service so asking for these specifically at the hotel desk would let them know that you want you clothes cleaned. "Could I please use the laundry service.": Specifically asking to use the laundry service, the desk would know that you would want to get your clothes washed and ironed.

It's usually regarded as polite to ask. So, if you ask "do you have a laundry service I could use?"the person will know that you would like to do your laundry. It's also possible to turn this into a statement: e.g. "I would like to use the laundry service".

"Does this hotel provide a laundry serivice" In this expression you are asking if this service is provided by the hotel, its obvious that by asking this you are making the employee aware that you want to use the service. "I would like to use the hotels laundry service please." This is just another way of letting the customer service rep that you want to use their laundry service. Now some hotels may only have laundry rooms where you do your own laundry so you always want to clarify that.

The first statement simply indicates your position and what you require. It is neither a direct request nor question, however indirectly, it is a request for assistance or further information. The second sentence is a direct question form. Example of an indirect question: "I could really do with having my clothes laundered!"

first example: Inquiry You are respectfully asking where could you wash(clean) your clothes. This question might be useful in many situations; like for example, when you are in a hotel room and would like to make use of the cleaning/washing your clothe service, when you go to a dry-cleanears or laundry mat and want to know how to proceed to have your clothes washed. Second example: Statement Very useful for when you need to inform someone about a specific piece of clothing that you need to wash. You could always change the noun(shirt) and talk about a specific piece of clothing.

In the first inquiry, you do not know if the hotel has a laundry service or not. So, you ,directly ask if there is a laundry service available at the hotel. In the second inquiry, it is assumed that you know that there is a laundry service at the hotel. So, your inquiry reflects the fact that there is a laundry service at this hotel. So, you may ask: Is there any laundry service available at this hotel? or May I please use the hotel's laundry service?