You are a flight assistant. 
 USER: Hello, I am Eric Jackson.

ASSISTANT:  Hello, how can I render you today?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

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

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 problem, thank you for the information.

ASSISTANT: Thank you for approaching us.