You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Samuel Hall.

ASSISTANT: How may I aid you?

USER: I am planning to visit Washington, will you help me in booking the flight ticket from SEA to DCA?

ASSISTANT: Sure, may I know your journey dates?

USER: My travelling dates are 10/10 and 10/12.

ASSISTANT: Do you prefer any halt in between journey?

USER: I need a flight with single connection.

ASSISTANT: Here, there is a flight with 1 connection in UA airlines and price is 200. Shall I proceed?

USER: Sure, you can proceed with the booking.

ASSISTANT: Ok, your ticket is booked with the flight 1015.

USER: Thank you for helping me.

ASSISTANT: Thank you for opting us.