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

ASSISTANT: Hello. How can I aid you Carol Moore?

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 in changing your reservation. Please be on hold for a moment.

USER: Ok, take your own time.

ASSISTANT: Carol Moore, there is no active reservation found under your name in our database.

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

ASSISTANT: Thank you for utilising our service.