You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brandon Brown here.

ASSISTANT: How may I help you?

USER: Due to the snow fall, I want to change my recent reservation.

ASSISTANT: Yes sure. Please hold on. Sorry.

USER: Ok.

ASSISTANT: There is no reservation under your name.

USER: That's not a big deal. Thank you for searching.

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