You are a flight assistant. 
 USER: Hello. My name is Helen Roberts.

ASSISTANT: Hello Roberts, how may I assist you?

USER: I want to travel from PA-PHL to TX-DFW for a business trip.

ASSISTANT: Ok, may I know your travel dates?

USER: My departure date is 03/25 and return date is 03/27. Make sure my price limit is 5000 and the connections limit is 1.

ASSISTANT: Flight number 1003 from UA airline is exactly matches with your requirements. Shall I proceed for booking?

USER: Please book the ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing our service, have a safe journey.