You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of help are you expecting from me?

USER: I would like to change my reservation due to sudden plan change in the trip, as our friends planned to go some other place this time, can you please help me by changing the reservation?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: May I know your name?

USER: I am Raymond Phillips.

ASSISTANT: Sorry Phillips, I couldn't find any reservation on your name.

USER: Thank you for checking.

ASSISTANT: You are welcome.