You are a flight assistant. 
 USER: Hello, Jonathan Harris here.

ASSISTANT: Hello,. How can I aid you?

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

ASSISTANT: Sure, will you please wait a moment I will check and get back to you.

USER: OK.

ASSISTANT: Sorry, there is no flights found on your name. Thank you. Have a nice day.