You are a flight assistant. 
 USER: Hi, I am Karen Williams.

ASSISTANT: Hello, how can I address you today?

USER: Due to the sudden change in climate, my badminton tournament has been postponed. Can you help me in changing my existing reservation?

ASSISTANT: Sure, we are here to help you to change your reservation. Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Ok, no issues. Thank you for your support.

ASSISTANT: Thank you for approaching us.