You are a flight assistant. 
 USER: Hi, my name is Donna Thomas.

ASSISTANT: Hello, how may I help you?

USER: Due to the sudden change in weather, my badminton tournament has been cancelled. So I want you to cancel my existing reservation?

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. There was no reservation found with your name.

USER: Ok, no issues. Thanks for your valuable information.

ASSISTANT: Thanks for availing us.