You are a flight assistant. 
 USER: Hello. I am Barbara Clark.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

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

ASSISTANT: Thank you for opting us.