You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: Please book a ticket from Washington DC-DCA to Phoenix, AZ-PHX.

ASSISTANT: Sure, I am glad to help you in booking the flight ticket. May I know your preferable travel dates?

USER: Departure is by 06/07 and return date is 06/09.

ASSISTANT: Ok, on which name I need to reserve the ticket?

USER: Helen Martin is the name.

ASSISTANT: Is there any specification in your connection limit?

USER: Connections limit 1.

ASSISTANT: Here, as per your requirement there is a connecting flight is available and airfare is about 300. Shall I proceed in booking?

USER: Do not proceed for booking flight. Thank you.

ASSISTANT: Can you let me know the reason for your disagreement?

USER: Airfare is 300.

ASSISTANT: Ok, Is it not within your budget? Please let me know.

USER: Yes.

ASSISTANT: Sorry Helen, there are no flights available for the price limit below 300.