You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I guide you?

USER: My name is Elizabeth Adams. I just want to book my flight ticket.

ASSISTANT: OK, please let me know your travel details for further process of booking?

USER: My travelling dates are from Jan/1 to Jan/3.

ASSISTANT: May I know your boarding and landing details, please?

USER: I want to start my journey from Washington DC - DCA.

ASSISTANT: Could you give your destination point?

USER: And my destination Washington DC-DCA.

ASSISTANT: OK, please wait for a while, I will revert you.

USER: My price limit is 500, with 1 connection limit.

ASSISTANT: OK, thank you for waiting. Sorry, we do not have any flight according to your request.

USER: Thank you, for providing details.

ASSISTANT: Thank you, have a happy day.