You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me to book a ticket from DCA to AUS?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are on July 12 and July 14.

ASSISTANT: Please share me your name.

USER: My name is Stephen Roberts.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in connecting flight.

ASSISTANT: We found a economy class flight on your details with Delta Airline, flight number: 1003. Shall I book this ticket?

USER: You can proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you so much.