You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I amend you today?

USER: I made a reservation earlier this week to attend for a seminar, but my seminar has been postponed. Can you please change my reservation?

ASSISTANT: Sure, we are glad to help you to change it. May I know your name?

USER: Sure, I am Katherine Rodriguez.

ASSISTANT: Sure, please be on hold.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Ok, Thanks for your service.

ASSISTANT: Thank you for contacting us.