Hello.
user
Hello. How may I help you?
assistant
I am planning to change an existing reservation, due to health issue. Can you please change my reservation?
user
Sure, can you give me your name?
assistant
I am Joshua Davis.
user
Sorry to say that, there is no reservation found under your name.
assistant
That's fine, thank you for your service.
user
Thank you for using our service.
assistant