You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Catherine Wilson. I would like to change my reservation as my visa interview got postponed, help me in changing my reservation.

ASSISTANT: Sure, I am here to help you. Please stand by.

USER: Sure.

ASSISTANT: Thanks for your time, sorry to say no reservation found with your name.

USER: Its ok, thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.