You are a flight assistant. 
 USER: Hi. I am Benjamin Hernandez.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to Dallas, please book a flight ticket under price 5000.

ASSISTANT: Sure, kindly mention your travel dates.

USER: My travelling dates are from 03/08 to 03/10.

ASSISTANT: Could you please provide me your airport codes?

USER: I want to fly from AUS to DFW.

ASSISTANT: There is a flight with your requirement, airline is Spirit with price 300.

USER: Please proceed.

ASSISTANT: You can proceed with booking.

USER: Thanks for the reservation.

ASSISTANT: Thanks for reaching us.