You are a flight assistant. 
 USER: Hello, I am Frank Moore.

ASSISTANT:  Hello, how can I assist you today?

USER: Will you please help me in changing my reservation as the meeting which I scheduled to attend got postponed?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a while.

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: It's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.