You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help that I can assist you today?

USER: I want to change my existing reservation, due to bad weather conditions. Can you please help me to change my reservation?

ASSISTANT: Sure, I will help you with that one. Can I know your good name please?

USER: Thank you for the response. My name is Betty Lewis.

ASSISTANT: Give me a moment.

USER: Ok, sure. I will wait for your response.

ASSISTANT: Thank you for waiting, I have checked in reservation list to change your ticket but could not find any reservation with your name in our data base.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: You are most welcome and thank you for consulting our agency.