You are a flight assistant. 
 USER: Hi. I am Carol Hill.

ASSISTANT: Hello, how can I render you today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me?

ASSISTANT: Sure, I will help you with that. Please wait a moment.

USER: Ok.

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: No issue, Thank you for the information.

ASSISTANT: Thank you for reaching us.