You are a flight assistant. 
 USER: Hello. I am Carol Edwards.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, I cannot find any reservation with your name.

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

ASSISTANT: It's my pleasure.