You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Please book my ticket from AUS to LGA.

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

USER: I will depart on Feb 10 and return on Feb 12.

ASSISTANT: May I know your connection limit?

USER: I have no other requirements, you can search for a flight ticket.

ASSISTANT: Sure, may I know your name please?

USER: Andrew Lee here.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.