You are a flight assistant. 
 USER: Hello. Kevin Nelson here.

ASSISTANT: Hello. How can I serve you today?

USER: I need to book a ticket to Washington DC-DCA. Can you please help me to book my ticket?

ASSISTANT: Sure, May I know the travelling dates?

USER: Depart is on 05/03 returning is on 05/05.

ASSISTANT: Can you provide your source point?

USER: Ya sure. IAD TO DCA.

ASSISTANT: Is there any limits?

USER: Ya price limit is 500 and with with one single connection.

ASSISTANT: There is a flight 1029 and UA airline and price 100 with a connection. Shall I proceed? Ok, Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thanks for connecting us.