You are a flight assistant. 
 USER: Hello, I am Anthony Lee.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to start a South Indian Restaurant in Washington, so please book a flight ticket from San Francisco.

ASSISTANT: Sure, may I know your travelling dates?

USER: My departure day is 05/22, return day is 05/24.

ASSISTANT: Kindly share your journey codes.

USER: My source and destination airport codes are CA - SFO, DC - DCA.

ASSISTANT: Please wait for a while, I will get back to you.

USER: Sure.

ASSISTANT: We found a direct flight with number 1022, shall I proceed with booking?

USER: No, I want connecting flight.

ASSISTANT: Ok, thanks for availing us.

USER: Thank you.