You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a fight from Washington. Can you book a connecting flight for me?

ASSISTANT: Sure, let me know your travelling dates?

USER: I will travel on Mar 3rd and return on Mar 5th.

ASSISTANT: May I know your airport codes?

USER: My source point is DCA and destination point is BOS.

ASSISTANT: Is there any other specifications?

USER: I want my depart flight in afternoon and return flight in evening.

ASSISTANT: Can I know your name?

USER: My name is Jerry Rodriguez.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.