You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I best serve you today?

USER: Can you please change my reservation as my plan to attend for art festival got postponed?

ASSISTANT: Sure, may I know your good name to check the reservation in our date base.

USER: I am Samantha Scott.

ASSISTANT: Thank you for providing your good name. I regret that there is no reservation found on your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for contacting our agency.