You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Steven Carter. Can you please help me in booking a flight ticket from SFO to reach JFK?

ASSISTANT: Sure, can you share your journey dates?

USER: My journey dates are from Mar 20 to Mar 22.

ASSISTANT: Do you have any preferences?

USER: My departure time is evening.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.