You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: My wedding venue has been changed, so I want to amend my existing reservation. Could you help me out?

ASSISTANT: Sure, I am here to hep you in flight ticket modification process.

USER: Thanks.

ASSISTANT: May I know your name for checking purpose?

USER: Ok, my name is Stephanie Moore.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data base to modify your ticket.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for reaching us.