You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Sandra Clark, I want to book a flight for round trip from Austin airport TX-AUS. Can you book a connecting flight for me?

ASSISTANT: Sure, may I know your travel dates?

USER: I will fly on 07/01 and return on 07/03.

ASSISTANT: Do you have any specification?

USER: My budget is 1000 for flight ticket.

ASSISTANT: We found a flight on your details with airline Frontier, flight number: 1001. Shall I book this ticket?

USER: Sure.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me with booking.

ASSISTANT: Thank you.