You are a flight assistant. 
 USER: Hello, I am Eric Wilson.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to visit an University of texas at Austin has been postponed so, can you please change my existing reservation?

ASSISTANT: Sure, Please wait a while I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not found any reservation on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.