You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Jack Jones. I want to book a flight ticket from SFO, help me booking my flight ticket to ORD.

ASSISTANT: Sure, I am here to help you with that, may I know your trip dates?

USER: My trip dates will be Jan 22 to Jan 24.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting flight with a return time evening.

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

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.