You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am looking for a flight from DCA to DEN, can you help me in booking?

ASSISTANT: May I know your connection limit?

USER: Please look for a connecting flight.

ASSISTANT: Can I know your travelling dates?

USER: Sure, my planned travel dates are Oct 09 and Oct 11.

ASSISTANT: May I know your name please?

USER: Myself Paul Rodriguez.

ASSISTANT: Do you have any other preference?

USER: No, thank you.

ASSISTANT: Here is a connecting flight with fare 100 and 1021 as flight number in American Airline. Shall I proceed with booking?

USER: That's fine, please proceed with booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for the service.

ASSISTANT: Thank you for reaching us.