You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: I am Gregory Baker. Can you help me with changing my reservation due to post pone of my tournament?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our data base to change.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for approaching us.