You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to book a flight from New York in evening time?

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

USER: I will fly on Oct 14 and return on Oct 16.

ASSISTANT: May I know your travelling airport codes?

USER: My source point is LGA and my destination is AUS.

ASSISTANT: Ok, please mention your name.

USER: My name is Gregory Miller.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Can you recheck the flight availability as I need a normal-cost airline and also connecting flight?

ASSISTANT: I have rechecked the flight availability  with your requirement but no flights are available on your route.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.