You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have some personal matters that need fixing, so I need to change an existing reservation. Can you please help me in that?

ASSISTANT: Sure, please provide your name to check the details of your reservation.

USER: My name is Elizabeth Phillips.

ASSISTANT: Sorry Phillips, there are no details found regarding your reservation.

USER: That's not a problem.

ASSISTANT: Thanks for choosing us, have a good day.

USER: Thanks for your information.