You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joseph Hall.

ASSISTANT: How can I help you today?

USER: Please book a flight ticket on dates 12/01 and 12/03.

ASSISTANT: Sure, I here to help you in booking. Could you please share your travelling airport codes?

USER: Sure, my airport codes are LAS and PHL.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: In my search, I found a flight for you with 1 stopover and it costs you 300. Can I proceed?

USER: I can pay only up to 200.So, please don't proceed with booking.

ASSISTANT: Sorry, no flights are available on your particular travel dates with in your budget.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us, have a safe flight.