You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Patrick Hernandez.

ASSISTANT: Welcome to our agency Patrick, how can I assist you?

USER: I'm from New York actually and yesterday night I have booked a flight ticket. I hope my reservation is confirmed but I have to change my reserved dates of travel. Can you please help me with that?

ASSISTANT: Sure, I am glad to help you.

USER: Ok.

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

USER: I think it's my mistake in booking ticket. It's ok. Thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us, have a good day.