You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, may I know your connection limit please?

USER: I need  a single connecting flight.

ASSISTANT: When do you want to travel?

USER: My journey dates are from May, 20 to May, 22.

ASSISTANT: Let me know your good name please.

USER: Mary Miller.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: There is a connecting flight 1023 in Frontier airlines at the cost of 500 with business class. Shall I proceed for booking with this flight?

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for choosing us.