You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jennifer Harris here.

ASSISTANT: How can I assist you Harris?

USER: Suddenly my friends cancelled the trip plan.So I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, please give me a moment.

USER: Ok.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for helping me.

ASSISTANT: Thank you for approaching us.