You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: John Johnson here.

ASSISTANT: How can I help you today?

USER: Due to some reason, I am unable to travel. Can you cancel my ticket?

ASSISTANT: Yes, I can do that for you. Give me a moment.

USER: Sure.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.