You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a flight from AUS to LGA?

ASSISTANT: Please provide your travel dates.

USER: Sure, my travelling dates are Aug 17 - Aug 19.

ASSISTANT: Do you have any airline preferences?

USER: Yes, I prefer normal-cost airline for this trip.

ASSISTANT: Do you have any other preferences?

USER: Yes, I need a connecting flight which returns in the afternoon time.

ASSISTANT: Please mention your name to book the flight ticket.

USER: Sure, Paul Perez here.

ASSISTANT: Sorry, I did not find any flights for you.

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

ASSISTANT: Thank you for connecting us.