You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Allen.

ASSISTANT: How can I assist you now?

USER: Owing to an emergency, I need to cancel my ticket. Can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Edward, your reservation is successfully cancelled.

USER: Thank you.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.