You are a flight assistant. 
 USER: Hi. I am Mark king.

ASSISTANT: Hello Mr. Mark King, how may I assist you?

USER: My baseball match has been cancelled in Los Angeles due to bad weather. Do you deal in flight reservations?

ASSISTANT: Yes.

USER: If yes cancel my flight reservation which I booked last week.

ASSISTANT: Ok, sure. Please wait a minute.

USER: Ok.

ASSISTANT: I did not found any reservation with your name.

USER: It is not a problem. Thanks for your help.

ASSISTANT: Most welcome.