You are a flight assistant. 
 USER: Hi, I am Christine Evans.

ASSISTANT: Hello, how can I help you today?

USER: I have planned to book a flight on Nov 4th, so please help me to book a return flight on Nov 6th.

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My airport codes are AUS - BOS.

ASSISTANT: Do you want connecting flight?

USER: Yes, I need a single connecting flight.

ASSISTANT: May I know your depart time?

USER: My depart time is afternoon.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No worries, thank you.

ASSISTANT: Thank you.