You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you today?

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

ASSISTANT: Sure, I am happy to help you. To proceed further, May I know your good name please?

USER: My name is Kimberly Garcia.

ASSISTANT: Thanks for your name. Please wait a minute.

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 choosing us. Have a blissful day!.

USER: Thanks for the help.