You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

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

ASSISTANT: Sure, I am happy to help you. Can I have your travelling dates?

USER: My travel dates are Feb 06 and Feb 08.

ASSISTANT: Do you have any stopover in between journey?

USER: I prefer direct flight for this trip.

ASSISTANT: Is there any other specifications for you?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Brenda Clark.

ASSISTANT: Sorry, no flights are available on your journey dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.