You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I assist you?

USER: Please book my ticket with the price under 200 to meet my cousin at Washington.

ASSISTANT: May I know your travel codes?

USER: Its from DCA to IAD of Washington.

ASSISTANT: Please mention travelling dates?

USER: My travelling dates are from 06/04 to 06/06.

ASSISTANT: Ticket can be booked with flight connections 1, airline is JetBlue. Flight number is 1025 with ticket fare 200.

USER: Ok, you can proceed.

ASSISTANT: To proceed further, please provide your name?

USER: I am Mark Hill.

ASSISTANT: Ticket is booked.

USER: Thank you.

ASSISTANT: Thanks.