You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER:  I made a reservation earlier in this week to give a seminar, but my seminar has been postponed.

ASSISTANT: Ok.

USER: I need to amend my reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Thank you. Matthew Edwards here.

ASSISTANT: I did not found any reservation on the name of Matthew Edwards.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for opting us.