You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I have planned to go for Museum, can you please change my existing reservation?

ASSISTANT: Sure, to change may I know your name?

USER: I'm Richard Thomas.

ASSISTANT: Thomas, I did not found any reservations with your name to change.

USER: Ok, fine. Thank you for your help.

ASSISTANT: It's my pleasure Richard Thomas. Have a good day.