You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me in booking a flight ticket from BOS to AUS?

ASSISTANT: Sure, we are mirthful to help you. On which dates would you like me to book a flight ticket for you?

USER: My trip dates are 10/21 - 10/23.

ASSISTANT: May I know your connection limit.

USER: I need a single connection.

ASSISTANT: Do you need any other requirements?

USER: My depart time should be in the evening.

ASSISTANT: May I know your name?

USER: David Wilson here.

ASSISTANT: We have a connecting flight operated by Spirit Airlines with a fare of 200. Shall I book your seat in this flight-1007?

USER: Please reserve.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you.

ASSISTANT: Thank you.