You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sandra Martin here.

ASSISTANT: How can I assist you at this moment?

USER: I want to attend a seminar in Minneapolis. Can you please help me for booking the flight ticket from Washington?

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: My travelling dates are from 01/30 to 02/01.

ASSISTANT: May I know your preferable airport code names for further process?

USER: My airport codes are from DCA to MSP.

ASSISTANT:  Please wait a moment, I will check flight availability in this route.

USER: Ok, I will wait.

ASSISTANT: Based on your information, JetBlue airline is ready to serve you with 1 connection with a minimum fare of 200 is available for you. Shall I proceed with this?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1020.

USER: Thanks for helping me.

ASSISTANT: You are welcome.