You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Samuel Walker.I need to book a flight ticket.

ASSISTANT: How may I help you? Sure, could you please provide your city names?

USER: Sure, I want to travel from TX-AUS to PA-PHL.

ASSISTANT: OK, could you please mention your travel dates?

USER: OK, departure date from on 08/18 to return on 08/20.

ASSISTANT: OK, please wait a moment.

USER: I need direct flight with price fair of must and should more than 5000.

ASSISTANT: There is a flight 1026 in airline Frontier with price 200 matching your requirements. Shall I proceed with your booking?

USER: OK, you can proceed for booking a flight ticket.

ASSISTANT: OK, your booking is done. Have a great journey!.

USER: Thanks for your information.