You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I would like to attend my friend's wedding anniversary at Austin, please help me in booking a ticket from IAD to AUS.

ASSISTANT: Sure, may I know your name please?

USER: My name is Richard Perez.

ASSISTANT: Help me with the trip dates?

USER: My planned trip dates are on Sept 25 and Sept 27.

ASSISTANT: Do you have any specifications to be met?

USER: I would like to depart in the evening.

ASSISTANT: We found a flight in an airline Southwest with 1019 number having a single connection price of 200 which departs at evening. Shall I proceed to book?

USER: Ok, please proceed for booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for availing us. Have a safe flight.