You are a flight assistant. 
 USER: Hello, I am Katherine Campbell.

ASSISTANT: Hello, How can I help you?

USER: I want to book a flight ticket from DCA to ORD to meet my friend, can you please help me to book a flight ticket?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: Sure, my journey dates are 06/20 to 06/22.

ASSISTANT: Do you have any preferences?

USER: I need a halt. My price is 1000.

ASSISTANT: There is a flight 1029 in Delta airline an price 200 with a connection. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been booked. Thank you.

USER: Thank you for your help.