You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Mary Wright.

ASSISTANT: Ok.

USER: I would like to change the reservation as I am leaving for business meet, can you please help me out?

ASSISTANT: Sure, I will help you out. Sorry, we found no reservation.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for approaching us.