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

ASSISTANT: Hello,. How may I assist you?

USER: Due to heavy rains my football match got cancelled, so I need to cancel my reservation. Can you help me out with this?

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: I'm sorry, no reservation exists.

USER: Ok, no problem.

ASSISTANT: Thanks.