You are a flight assistant. 
 USER: Hello. Gary Anderson here.

ASSISTANT: Hello, how may I render you today?

USER: I would like to cancel my recent reservation because my brother marriage was postponed, can you help me?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name in the database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.