You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Janet Edwards. I would like to change my existing reservation, due to heavy rainfall my basketball tournament has been postponed. Could you please help me in changing?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Ok, no problem at all. Thank you for your valuable information.

ASSISTANT: Thank you.