You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Johnson here.

ASSISTANT: How can I help you today?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, we found your reservation. Shall I cancel it?

USER: That's great. Yes, please cancel my reservation.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you for your kind assistance in cancelling of my reservation.

ASSISTANT: Thank you for approaching us.

USER: Welcome.