You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Jones.

ASSISTANT: Jones, how can I help you today?

USER: I would like to book a ticket from Washington to Chicago to meet my friends.Can you please book a ticket fro me?

ASSISTANT: Sure, can you please provide me your preferred airport codes?

USER: My nearest source airport code is DCA and destination airport code is ORD.

ASSISTANT: Sure, let me know your trip dates.

USER: I would like to travel on 01/31 and return on 02/02.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: There is a flight available with AA airlines and the ticket costs you 100 only. Shall I book your ticket?

USER: May I know the connection?

ASSISTANT: Yes, this flight is with 1 connection.

USER: Please, can you search flight with 0 connection.

ASSISTANT: Sorry Jones, there are no direct flights available on your preferred dates.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you for contacting us.