You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Kimberly Collins. My business meeting was postponed to another location, so please change my existing reservation.

ASSISTANT: Ok, please wait a while.

USER: Sure.

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

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.