You are a flight assistant. 
 USER: Hello. I am Gary Adams.

ASSISTANT: Hello, how may I aid 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: Sure Gary, I am here to help you out. Please allow me a moment to check your reservation.

USER: Ok, take your own time.

ASSISTANT: Sorry Gary, there is no reservation on your name in our data base.

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

ASSISTANT: Thank you for reaching us.