You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to celebrate my sister birthday at Austin, TX - AUS. Can you help me in booking ticket from Dallas, DFW?

ASSISTANT: Sure, please share me your travelling dates?

USER: 04/12 and 04/14 are my travelling dates.

ASSISTANT: Do you need any flag stop in between your journey?

USER: Yes, I need a stop over.

ASSISTANT: May I know your budget for flight ticket?

USER: 5000 is my budget.

ASSISTANT: We found a flight with Spirit airlines of flight number 1023 with fare 100.

USER: Please proceed for booking.

ASSISTANT: May I know your name please for further proceedings?

USER: Sandra Lopez is my name.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for reaching us.