You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Michael Williams. I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure, I am perky to help you. Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Thanks  for waiting, we did not find any active reservation on your name in our records.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for opting us.