You are a flight assistant. 
 USER: Hello, I am Emily Green.

ASSISTANT: Hello, how may I aid you?

USER: Due to an emergency meeting, I want to cancel my reservation. Can you help me with it?

ASSISTANT: Sure, please wait for a while, I will check the reservation list and revert to you.

USER: OK.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.