You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

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

ASSISTANT: Sure, I will assist you.

USER: Thank You.

ASSISTANT: May I know your connection limit?

USER: I prefer to fly with a connecting fight.

ASSISTANT: Please help me with your travelling dates to proceed further in booking a flight ticket.

USER: I want to start on Mar 29 and intend to return on Mar 31.

ASSISTANT: Let me know your name please to book a ticket.

USER: My name is Nancy Edwards.

ASSISTANT: Do you have any time concern?

USER: Yes, I want to return in the evening flight.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that there are no flights available on your mentioned details.

USER: No problem, thank you.

ASSISTANT: Thank you for approaching us.