You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you aid me to book my ticket from IAD to MCO?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travel dates are Nov 16 and Nov 18 respectively.

ASSISTANT: Do you have any other specifications?

USER: I prefer for direct flight.

ASSISTANT: Please help me with your name for booking.

USER: Eric Evans here.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.