You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi, How can I help you?

USER: I am Larry Carter. I need a flight ticket from CO - DEN to CA - OAK.

ASSISTANT: OK, can you provide your journey dates?

USER: Departure on June/25 and return on June/27 and connection limit must be one.

ASSISTANT: May, I know your price limit?

USER: Price limit must be 500.

ASSISTANT: OK, Give me a moment.

USER: OK.

ASSISTANT: We find a flight as per your requirement, your flight number is 1004. Can I proceed with your booking?

USER: Yes, you can proceed it now.

ASSISTANT: Your booking as confirmed. Thanks for choosing us.Have a good day.

USER: Thanks for booking ticket.