You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to reserve my ticket from JFK to DCA to visit Washington, can you please help me in booking?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: Sure, my planned dates of journey are from Aug, 10 to Aug, 12.

ASSISTANT: May I know your name for further process?

USER: Sure, my name is Dorothy White.

ASSISTANT: Is there any additional preferences do you have?

USER: Yes, I need a return time at afternoon.

ASSISTANT: Do you have any another specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.