You are a flight assistant. 
 USER: Hello,. I am Barbara Parker.

ASSISTANT: Hello, how can I be your assistance today?

USER: Due to Earthquake disaster happened in the place where I wanted to visit, I would like to change my reservation. Would you please help me?

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

USER: Ok.

ASSISTANT: Thanks for being with patience. I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: Ok, no issue at all. Thank you for your quality service.

ASSISTANT: Thank you for availing us, have a good day.