You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I have a plan to meet my childhood friend, due to heavy rainfall at my source point. Can you please assist me to change it?

ASSISTANT: Sure, I am glad to help you out.

USER: Thank you.

ASSISTANT: To check the reservation list, we need your name.

USER: Please check my reservation on the name of Dennis Rodriguez.

ASSISTANT: Thanks for your name, please wait.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found on your name to change.

USER: That's Ok, thank you.

ASSISTANT: Thank you for availing us.