You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: I want to cancel my recent reservation, due to an emergency. Can you help me?

ASSISTANT: Sure, may I know your name please?

USER: Yes, I am Emily Clark.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you.