You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you  now?

USER: Please help me to book a flight ticket from PHX to DFW.

ASSISTANT: Sure, I will help you with that. Can I have your  travel dates  please?

USER: My travelling dates are 01 to 03 of Sep.

ASSISTANT: Do you  prefer any specific airlines?

USER: No.

ASSISTANT: Do you  have any other specifications?

USER: I prefer to depart in the evening with a connecting flight.

ASSISTANT: Can I have your  good name please?

USER: I am Robert Miller.

ASSISTANT: Spirit  airlines running a flight in your route with connection 1 and the ticket fare is 200 in economy class. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Ok,  your  ticket booking has done and the flight number is 1012.

USER: Thank you.