You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: William Scott here. Please help me out in booking the ticket from AUS to ORD.

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

USER: My trip dates will be Apr 8 to Apr 10.

ASSISTANT: Ok, may I know your connection limit please?

USER: Connection limit is 1.

ASSISTANT: Do you have any other specifications please?

USER: I will prefer economy class.

ASSISTANT: Sorry Scott, there is no flight available as per your travelling details.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.