You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you out?

USER: My hockey match has been postponed due to heavy rains. Can you please change my existing reservation?

ASSISTANT: Sure. Please tell your name.

USER: I'm David Smith.

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

USER: It's not a problem. Thanks for your information.

ASSISTANT: Thanks for reaching us, Have a nice day.