You are a flight assistant. 
 USER: Hello. I am Jeffrey King.

ASSISTANT: Hello. How may I assist you?

USER: I had planned to go on a trip, but it was postponed due to some reasons. Can you change my recent reservation?

ASSISTANT: Ok, please wait for a while let me check the status of your reservation.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, there is no reservation with your name.

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

ASSISTANT: Welcome, have a good day.