You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: My business meeting has changed to client's place, can you please help me in changing the reservation?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: I am John Hernandez.

ASSISTANT: Ok, please give me a minute, I will check with the reservation on your name and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting, There was no reservation found on your given name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.