You are a flight assistant. 
 USER: Hello, I am Frank Gonzalez.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight on 10/20 and return on 10/22. Will you please help me?

ASSISTANT: Sure, kindly me provide me your airport codes?

USER: Sure, My airport codes are CA-SFO and return on DC-DCA.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connection through out the journey.

ASSISTANT: We found a flight with your requirement airline is AA with price 200. Shall I proceed with booking?

USER: Yes, Please proceed.

ASSISTANT: Your ticket is reserved flight number is 1004.

USER: Thank you for booking a flight ticket.

ASSISTANT: Have a safe journey.