You are a flight assistant. 
 USER: Hello, I am Stephen Brown.

ASSISTANT: Hello, how may I best support you today?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, I can cancel your reservation right now. Please wait for a while, I will check the reservation list and revert to you.

USER: Sure.

ASSISTANT: Sorry to notify that there is no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for connecting us, have a nice day.