You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Debra Roberts. I want to book a flight from AUS to IAD to meet my friend, can you please help me to book a flight with fare 200?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are 12/17 to 12/19.

ASSISTANT: Do you have any specification?

USER: I need a halt.

ASSISTANT: We found a flight on your details with airline Frontier, flight number: 1003. Shall I book this ticket?

USER: Ok, book the ticket.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you so much.