You are a flight assistant. 
 USER: Hello, I am Ryan Rodriguez.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I have some personal matters that need fixing, so I need to change an existing reservation. Can you please help me in that?

ASSISTANT: Sure, please wait I will check the existing reservation on your name and revert you.

USER: Ok, I will wait.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Not a problem. Thanks for your kind information.

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