You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you today?

USER: Owing an emergence, I want to change my existing reservation. Can you help me with it?

ASSISTANT: Sure, I will help you with that. To proceed further, I need your name?

USER: My name is Nicole Miller.

ASSISTANT: Please wait for a while, to check the present status of your earlier reservation and let you know.

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 issues.

ASSISTANT: Thank you for reaching us, Have a blissful day!.

USER: Thanks for the help.