You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am looking for a flight from OAK to attend family meeting at Austin. Can you book a flight to AUS?

ASSISTANT: Sure, May I know your journey dates?

USER: I will travel on Dec 16 and return on Dec 18.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Is there any other preferences?

USER: Yes, I want my return flight in afternoon.

ASSISTANT: May I know your name?

USER: My name is Carolyn Garcia.

ASSISTANT: Sorry, There are no flights found on your data.

USER: Ok, thank you for the details.

ASSISTANT: Thank you.