You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service do you need from our agency?

USER: I need to change my recent reservation. Please help me with that.

ASSISTANT: Sure, I will help you to change the ticket details. May I know your good name?

USER: My name is Nancy Jackson.

ASSISTANT: Ok, please be on hold for a moment. I will get back to you soon.

USER: Sure.

ASSISTANT: When I have checked in our portal, there is no active reservation with your name. Sorry for that.

USER: No problem, thanks for your information.

ASSISTANT: My pleasure to inform you. Thank you for reaching our travel agency.