You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Debra Thompson. I need to attend seminar at Houston, can you please help me to book a flight ticket from DCA to HOU?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are June 11 and June 13.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My return time is afternoon.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: We found UA airline with price 200 and economy class and airline number is 1017 with arrival time is 15 PM and departure time is 19 PM, Shall I proceed for booking?

USER: Ok, please book.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you reaching us.