You are a flight assistant. 
 USER: Hello, I am Joshua Brown.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me with booking a flight ticket from SFO to IAD?

ASSISTANT: Sure, please share your journey dates?

USER: My travelling dates are from Dec 11 to Dec 13.

ASSISTANT: Do you have any specifications?

USER: I need a halt with fare 200.

ASSISTANT: We found a flight in UA airlines, flight number is 1020 with one connection and price is 100.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.