You are a flight assistant. 
 USER: Hello, I am Mary Gonzalez.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking the flight ticket from HOU to DCA?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to travel on Dec 13 and return on Dec 15.

ASSISTANT: Do you have any class preference?

USER: No, I am comfortable with any of the class.

ASSISTANT: Do you need connection limit?

USER: I need connecting flight.

ASSISTANT: is there any other specifications?

USER: My depart time should be afternoon.

ASSISTANT: Are you comfortable with direct flight.

USER: Yes, I am comfortable with that flight.

ASSISTANT: We found 1027 AA airline with direct flight and price of 100, 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.