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

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation.

ASSISTANT: OK, please wait. I will check and get back to you.

USER: OK.

ASSISTANT: Thank you for your time. Sorry, there is no flight found with your name.

USER: Thanks for the details.

ASSISTANT: Thank you, have a great day.