You are a flight assistant. 
 USER: Hello. Due to having an heavy rains, my tournaments was postponed.

ASSISTANT: Hello, how can I aid you?

USER: For this I want to change my existing reservation with the name of Rachel Moore.

ASSISTANT: Sure. Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, we did not found any reservation on your name.

USER: No problem. Thank you for your helping hand.

ASSISTANT: Thanks for contacting us.