You are a flight assistant. 
 USER: Hello, I am Jack Brown.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Could you help me in booking a flight ticket from SEA to MCO?

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

USER: I want to fly on Dec 19, return on Dec 21.

ASSISTANT: Do you need any halt in this journey?

USER: I want direct flight.

ASSISTANT: Do you have any other preference for this trip?

USER: No.

ASSISTANT: Jack Brown, there are no direct flight services available on this route on your provided dates.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.