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

ASSISTANT: Hello, how can I guide you?

USER: Can you aid me in booking a flight ticket from SFO to IAD?

ASSISTANT: Sure, can you share your journey dates?

USER: Sure, I would like to go on Nov 21st and return back on Nov 23rd.

ASSISTANT: Do you have any preferences?

USER: Ensure it is a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: There is a direct flight with number 1028 in airline Delta, the fare is 200 in economy class. Can I book it?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket is reserved, the depart time is 14:00 PM and return time is 14:00 PM.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.