You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, may I know your name please?

USER: Amy Roberts here.

ASSISTANT: Wait a while, kindly.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data base to cancel your previous booking.

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

ASSISTANT: Thank you for reaching us.