You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I want to book a flight ticket from AUS to LGA. Can you please help me in that?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: May I know when would you like to make your journey?

USER: I will fly on Jan 27 and return on Jan 29.

ASSISTANT: Do you have any restrictions on connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any more preferences?

USER: No.

ASSISTANT: May I know your good name please?

USER: Myself Nicholas Hall.

ASSISTANT: Sorry we did not find any flights matching your preferences.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.