You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Jacob Baker, I need to change my reservation as my schedule got postponed.

ASSISTANT: I will help you about that.

USER: Thank you.

ASSISTANT: Sorry to say this Jacob, there are no active reservations under your name to change.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.