You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Please let me know your travelling dates?

USER: My travel dates are from Dec 1st to Dec 3rd.

ASSISTANT: Can I know your connection limit?

USER: I want a single connection.

ASSISTANT: Do you have any other preference?

USER: I want an economy class.

ASSISTANT: May I know your name please?

USER: I am Lisa Davis.

ASSISTANT: Sorry, no flights available on your route.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.