You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: As my trip to Dallas got cancelled, can you please help me by cancelling my recent reservation?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My previous reservation has done with the name Catherine Lewis.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Catherine, there is no reservation found as per your name to cancel your reservation.

USER: Ok, not an issue. May be something went wrong while making the reservation. Thank you for providing information.

ASSISTANT: You are welcome and have a great day.