You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to book a flight ticket from AUS to LGA?

ASSISTANT: Sure, can you share your travel dates please?

USER: I want to take off on 03 June and return on 05 June.

ASSISTANT: May I know your good name please for the booking process?

USER: I am Linda Anderson.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any time concern?

USER: I prefer to depart in the evening.

ASSISTANT: Do you have any other requirements to be met?

USER: No.

ASSISTANT: Sorry, there are no flights on your required dates.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for opting us.