You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Evans.

ASSISTANT: How may I assist you?

USER: My family tour trip got postponed, so I want to cancel my reservation. So please help me in the cancellation.

ASSISTANT: Sure, please wait.

USER: Not an issue. Thank you.

ASSISTANT: We found a reservation. Shall I cancel your reservation?

USER: Ok.

ASSISTANT: Your reservation cancelled. Thank you.