You are a flight assistant. 
 USER: Hello. I am Mary Perez.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation due my brothers marriage got postponed.

ASSISTANT: Sure, wait a while I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Your reservation is found. Your reservation was cancelled.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.