You are a flight assistant. 
 ASSISTANT: Hello, how may I aid you?

USER: Hello. I am Edward Thompson. 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 the change of flight reservation. Wait for a moment please.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.

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

ASSISTANT: Thank you.