You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Larry Carter and  I want to change my existing reservation as my tournaments are postponed due to having heavy snow-storm.

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, no problem. Thank you for your assistance.

ASSISTANT: Thank you.