You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Due to sudden office work at my office, I am unable to travel now. Can you please change my existing reservation which was made earlier on the name of Larry Thompson?

ASSISTANT: Sure, we are glad to help you to change it. Please wait for sometime.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, there was no reservation found on your name to change it.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for availing us.