You are a flight assistant. 
 USER: Hello.

ASSISTANT: How may I assist you at this moment?

USER: Helen Garcia here. I would like to travel from DCA to JFK, can you help me to make a flight reservation?

ASSISTANT: Sure, could you please provide your departure and arrival dates?

USER: My travelling dates are Mar, 02 and Mar, 04.

ASSISTANT:  Is there any another specifications on your trip, so that I can arrange like that only.

USER: I need a flight with halt between journey.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flights available on your request.

USER: That's fine, thanks for your information.

ASSISTANT: Welcome, thank you for reaching us.