You are a flight assistant. 
 USER: Hi. I am Mary Lee.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation due to sudden change in my trip.Can you help out with this?

ASSISTANT: Sure. Wait a minute.

USER: OK.

ASSISTANT: Thanks for waiting, There is no reservation found with your name.

USER: OK. Thank you for your information.

ASSISTANT: Thank you.