You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Brian Gonzalez here. Can you please help me in booking the flight ticket from DCA to IAH?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to travel on Sept 27 and return on Sept 29.

ASSISTANT: Do you have any specifications?

USER: Yes, I need connecting flight.

ASSISTANT: We found 1004 Spirit airline with single connection and price of 300 in economy class. Shall I proceed with booking?

USER: Please proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thank you for booking the flight ticket.

ASSISTANT: Thank you for reaching us.