You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Could you please help me to book an economy class ticket from NY to visit Olympic National Park in DC?

ASSISTANT: Sure, I am here to help you. May I know your journey dates, please?

USER: I need to depart on 06/17 and my return date will be on 06/19.

ASSISTANT: Please, share me your airport codes.

USER: My source airport code is JFK and my landing airport code is IAD.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight for this time.

ASSISTANT: May I know about your other specifications?

USER: I am Steven Harris.

ASSISTANT: Let me know your name to proceed further.

USER: Please book the ticket with the name Steven Harris.

ASSISTANT: Sorry to say that, there are no flights running on your routes.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thanks for opting us.