You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Stephanie Martinez. I would like to book a ticket from JFK to ATL, can you please help me out?

ASSISTANT: Can I have your travel dates?

USER: I am travelling on these dates July 15th and 17th.

ASSISTANT: May I know your other specifications?

USER: I need a direct flight.

ASSISTANT: Is there any class preferences?

USER: I don't have any class preference.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thanks for consulting us.