You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Gregory Scott. As I am very much excited to visit Denver, I need a ticket to DEN on 03/01. My return would be on  03/03.

ASSISTANT: Sure, can you please share your journey points?

USER: My source point is OAK and I want one connection in between my journey.

ASSISTANT: Do you have any price limit?

USER: The price should not exceed 500.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that we have not found any flights with your given details.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thanks for the information.

ASSISTANT: Thank you.