You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Please help me to book a flight ticket from PHL to SFO.

ASSISTANT: Sure, may I know your name for further process?

USER: Justin Miller.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My journey dates are from Mar, 23 to Mar, 25.

ASSISTANT: Do you prefer any specific class preference?

USER: No.

ASSISTANT: May I know your connection limit please?

USER: I need a single connecting flight.

ASSISTANT: May I know your preferable time for journey?

USER: I am comfortable with any time.

ASSISTANT: There is a direct flight of fare 100 with economy class in Southwest airline, shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1002.

USER: Thank you for booking.

ASSISTANT: You are welcome.Thank you for reaching us.