You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Margaret Lopez here. I would like to book a ticket from AUS to DTW, can you please help me with that?

ASSISTANT: Sure, may I know your travelling dates?

USER: The travel dates are from 11/29 to 12/01.

ASSISTANT: Do you need any lay by in between the journey?

USER: I need a halt.

ASSISTANT: Thanks for the information.

USER: Ok.

ASSISTANT: There is no flight available on mentioned codes.

USER: That's ok, thank you for your help.

ASSISTANT: Thanks for reaching us.