You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I want to change my reservation due to some personal work at home, so please help me in changing.

ASSISTANT: Sure, I can help you and may I know your name for checking purpose?

USER: Sure, my name is Emily Rodriguez.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I have checked in reservation list to change your ticket but could not find any reservation with your name.

USER: Not an issue, thank you.

ASSISTANT: You are most welcome and thank you for reaching us.