You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: Stephanie Scott here. I would like to change my reservation, can you please help me out?

ASSISTANT: Sure, I am happy to help you in changing the ticket details.

USER: Thank you.

ASSISTANT: Sorry to inform you that, there is no active reservation found with your name to change the details.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: You are welcome. Thank you for connecting with our agency.