You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Brian Martinez. I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure, please wait while I check your current reservation.

USER: Ok, take your time.

ASSISTANT: Sorry Brian Martinez, we don't see any reservation on your name.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you.