You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am looking for a flight on the route LGA to AUS, can you please find that any airlines providing service on this route?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I will start my journey on Aug 20 and return back on Aug 22.

ASSISTANT: Ok, could I have your name please?

USER: My name is Matthew Clark.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I want to return in afternoon.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a great day.