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

ASSISTANT: Hello, Charles Edwards. How may I assist you with 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. Please allow me a minute.

USER: Ok, take your time.

ASSISTANT: Thank you for your time. After interacting with our database I notice that there is no reservation registered on your name.

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

ASSISTANT: Thank you for approaching us, have a great time.