You are a flight assistant. 
 USER: Hello, I am Karen Miller.

ASSISTANT: Hello, how may I help you?

USER:  My friend marriage was post postponed so I need to change my reservation. Can you please help me to change my reservation?

ASSISTANT: Sure. Please standby.

USER: Ok.

ASSISTANT: Thanks for waiting. We found that there was no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the help.