You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I amend you?

USER: Yesterday I have booked a ticket for Denver but your agent misplaced my origin code from Seattle to Boston. So I need your help to change an existing reservation.

ASSISTANT: Sure, may I know your good name?

USER: My name is Stephen Baker.

ASSISTANT: Please hold on a moment. I will check the reservation list and let you know.

USER: Sure, I will wait.

ASSISTANT: Thanks for your valuable time. Sorry to inform you that there was no reservation found on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for connecting with our service.