You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name please?

USER: My name is Patrick Lee and I want to book a ticket.

ASSISTANT: Sure Patrick, how can I assist you for today?

USER: I want to book a ticket.

ASSISTANT: Sure, please tell me the travelling details?

USER: My origin airport code is OAK and destination airport code is DCA.

ASSISTANT: What were the travelling dates of your journey?

USER: My departure date is 02/26 and return date is 02/28.

ASSISTANT: OK, please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting Patrick, there is a flight 1003 in UA airline has the price 100 and the connections limit is 1.

USER: That's perfect. Please proceed for booking.

ASSISTANT: Now your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you, have a safe journey.