You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you now?

USER:  I am John Smith want to cancel my reservation owing an emergency. Can you please help me in cancelling?

ASSISTANT: Ok, wait a while.

USER: Ok.

ASSISTANT: Thanks for waiting. No reservation was found on your name.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us, have a pleasant day.