You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Nancy 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, please wait for a moment to check your reservation status in my records.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found on your name.

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

ASSISTANT: Thank you for reaching us, have a nice day.