You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melissa Phillips.

ASSISTANT: How may I aid you?

USER: Can you help me in cancelling my recent reservation?

ASSISTANT: Sure, I am ready to help you.

USER: Thank you.

ASSISTANT: Sorry, there are no reservation found on your name.

USER: That's not a problem. Thank you.

ASSISTANT: Thank you for approaching us.