You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me to book a flight from DFW to OAK?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travel dates are Feb 22 to 24.

ASSISTANT: Do you have any connection limit?

USER: I prefer direct flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: No.

ASSISTANT: Please help me with your name for booking.

USER: I am Patrick Turner.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.