You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Thomas.

ASSISTANT: What can I do to make your experience better with us?

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

ASSISTANT: Sure, I 'll help you. Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately we did not found any reservation by this name.

USER: Ok, no problem.

ASSISTANT: Thanks for opting us.

USER: Thanks for your information.