You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Stephen Scott. Can you help me in finding a flight from JFK to DCA?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My trip dates will be Mar 18th to Mar 20th.

ASSISTANT: Do you have any class preferences?

USER: I am fine with any class.

ASSISTANT: Do you have any airline preferences?

USER: I need a normal cost airline.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: My return time should be in the afternoon with a stopover.

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

USER: Its ok, thank you.

ASSISTANT: Thank you for contacting us, have a nice day.