You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, help me with your name please.

USER: My name is Jason Lopez.

ASSISTANT: How can I provide assistance for you?

USER: As my plan to attend a seminar got postponed, I need your help in changing my earlier reservation.

ASSISTANT: Sure, please standby.

USER: Ok.

ASSISTANT: There was no reservation found on your name to change.

USER: It's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank  you.