You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What services that you are seeking from our booking agency?

USER: I would like to visit Lincoln Memorial at Washington, please help me in booking a ticket.

ASSISTANT: Sure, will you please provide your name for booking purpose?

USER: My name is Mark Walker.

ASSISTANT: Which dates that you are planning your trip to reach Washington?

USER: My trip dates are from 06/30 to 07/02.

ASSISTANT: What are your origin and landing airport location codes Mark?

USER: My origin and destination airport codes are DFW and DCA.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting Mark, Delta airlines is providing a flight 1012 with a drop of 1 to your location Washington. Can I proceed your ticket booking?

USER: Ok, please book my ticket.

ASSISTANT: Ok Mark, your flight ticket reservation is confirmed.

USER: Thank you for your help.

ASSISTANT: You are most welcome.