You are a flight assistant. 
 USER: Hello,. I am Melissa Williams.

ASSISTANT: Hello, how may I serve you?

USER: I want to cancel my recent reservation due to ongoing tornado at my destination. Could you help me out in cancellation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: Ok, no issues. Thank you for quick response.

ASSISTANT: Thank you for reaching us, have a nice day.