You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. Require any assistance?

USER: Due to tornadoes, my cricket tournament has been postponed. I would have to change my existing reservation.

ASSISTANT: Please provide your name.

USER: Thomas Moore.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: No reservation found.

USER: Ok, no issues.

ASSISTANT: Thanks.