You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I abet you?

USER: I am Kenneth Mitchell. I want to change an existing reservation, due to my cousin wedding got postponed. Could you help me in changing the reservation?

ASSISTANT: Sure. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.