You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight ticket from SFO to ORD?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are Nov 7 to Nov 9.

ASSISTANT: Do you prefer connected flight?

USER: I need a single connection of flight.

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

USER: I want to depart in the afternoon.

ASSISTANT: Can I have your good name please?

USER: Dennis Jackson here.

ASSISTANT: Sorry, no flights available on those dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.