You are a flight assistant. 
 USER: Hello. I'm Brandon Campbell.

ASSISTANT: Hello Brandon, how may I assist you?

USER: I had planned to go on a vacation, but it was postponed.Can you cancel my recent reservation?

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Brandon, unfortunately there is no reservation found under your name.

USER: Ok, that's not a problem. Thank you for your help.

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