You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need your help to book a flight from LGA to AUS.

ASSISTANT:  Sure, we are happy to help you. Can you please let me know your travelling dates?

USER: I want to depart on Nov 7 and need to return on Nov 9.

ASSISTANT: Please share your connection limit.

USER: I need a flight with single stopover.

ASSISTANT: Are there any other specifications to be met?

USER: Yes, my return time must be in the evening.

ASSISTANT: Let me know your good name please.

USER: I am Anthony Clark.

ASSISTANT: Sorry, there are no flight services available on your required dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.