You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I be in your service?

USER: Here Patricia Thompson. I would like to change my recent reservation because my brother marriage is cancelled.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there are no flight ticket reserved on your name to change.

USER: That's ok, thank you for giving information.

ASSISTANT: Thank you for choosing our agency.