You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help 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 am mirthful to help you with that. Can you please share me your name?

USER: Thank you for the response, George Clark is my name.

ASSISTANT: Please hold on for a while.

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

ASSISTANT: Sorry, no reservation found on your name in our database to change your reservation.

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

ASSISTANT: Thank you for reaching us, have a nice day.