You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: As part of my schedule, I made a reservation earlier to attend live music concert. But, due to some health issues I was unable to attend. So, can you please help me in changing my reservation?

ASSISTANT: Sue, to proceed further we need to know your name.

USER: I am Melissa King.

ASSISTANT: Ok, please hold on for 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: Ok, no problem. Thanks for your kind service.

ASSISTANT: Thanks for your interest on us.