You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from LAS to SFO?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travelling dates are Sept 10 and Sept 12.

ASSISTANT: Let me know your connection limit.

USER: I need single connection flight.

ASSISTANT: Do you have any specification? Ok, please mention your name.

USER: No. Myself Stephen Perez.

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

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us, have a nice day.