You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to visit San Francisco, can you please book my flight ticket from DCA to SFO?

ASSISTANT: Ok, please can I know your dates of journey to proceed further?

USER: I will take-off on Oct 4th and return back on Oct 6th,.

ASSISTANT: Ok, please can I know your preferred connection limits?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please can I know your name?

USER: Myself Jennifer Harris.

ASSISTANT: Sorry, there are no flights available at your locations provided.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for choosing our agency.