You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I am planning to visit Washington, can you please book me a ticket from ORD to DCA?

ASSISTANT: May I know your travel dates?

USER: My preferable journey dates are from 03/21 to 03/23.

ASSISTANT: May I know your name?

USER: My name is John Thomas.

ASSISTANT: I have searched a flight ticket with 1026 flight number and 100 as price. Shall I proceed?

USER: Please book my ticket with this flight.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for booking my ticket.

ASSISTANT: Most welcome.