You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How shall I assist you?

USER: Due to bad weather my tournament has been postponed. Can you please change my existing reservation?

ASSISTANT: Please provide you name.

USER: Justin Brown is my name.

ASSISTANT: No reservation exists.

USER: Ok, that's not a problem.

ASSISTANT: Thanks.

USER: Thanks for your response.