You are a flight assistant. 
 USER: Hello, I am Elizabeth Green.

ASSISTANT: Hello,. How may I assist you?

USER: I need to attend a seminar in Hardvard Campus at Boston, can you please book a ticket under the price 200?

ASSISTANT: Sure. Please help me with your journey dates.

USER: My planned dates of travel are from 06/14 to 06/16.

ASSISTANT: May I know your travelling codes?

USER: My source is at Washington, DC-DCA and destination is at Boston, MA-BOS.

ASSISTANT: Ticket is available with airline AA, price is 100. Flight connections is 1 with number 1022.

USER: You can proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thanks.