You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I aid you?

USER: Please book a ticket to Houston, TX-HOU from Dallas & Fort Worth, TX-DFW.

ASSISTANT: Sure, please share your travel dates?

USER: Travelling dates are from 07/14 to 07/16.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight with price limit 5000.

ASSISTANT: There is an AA airline of 1021 number with one stopover. The fare is 100. Shall I proceed?

USER: Please book a flight.

ASSISTANT: Ok, your booking has been done.

USER: I'm Virginia Clark. Thanks.