You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Jerry Williams. I have planned a round trip for two days from DFW to PHL, trying to book a flight ticket.

ASSISTANT: Jerry, can you please help me with your travelling dates?

USER: Sure. I am planning from 01/30 to 02/01.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Ok.

ASSISTANT: Jerry, there is a flight available with price 100. Would you like me to proceed the booking?

USER: Yes, please book this flight ticket.

ASSISTANT: Your booking is confirmed with UA airline and the flight number is 1000. Sure.

USER: Thank you for booking.

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