You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My meeting ha been postponed, can you please help me in changing the reservation?

ASSISTANT: Sure, may I know your name please?

USER: I am Paul Clark.

ASSISTANT: Please wait for a while, I will check and revert you.

USER: Ok.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Ok, no issues. Thank you for giving information.

ASSISTANT: Thank you for reaching us, have a good day.