You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning to visit Lady Bird Lake at Austin, could you please help me with booking a flight ticket from LGA to AUS?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I would like to depart on Dec 3rd and return on Dec 5th.

ASSISTANT: Can you please share me your good name?

USER: I am Jeffrey Robinson.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Let me know your specifications.

USER: I need a economy class flight. And make sure that my return time must be evening.

ASSISTANT: There are no flights found with your given information.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.