You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I render you today?

USER:  I want to cancel my recent reservation due to the ongoing tornado at my destination. Can you help me with that?

ASSISTANT: Sure, please help me with your good name?

USER: I am Karen Harris.

ASSISTANT: OK, please wait for a while I will check the data base and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: Sorry to say you we found there is no reservation with your specification.

USER: No problem. Thanks for the information.

ASSISTANT: Thank you for choosing us, have a good day.