You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in booking flight ticket from ORD to AUS.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are May 08 and May 10.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: I want a ticket in economy class.

ASSISTANT: May I know your name?

USER: My name is Stephanie Carter.

ASSISTANT:  Sorry to inform you that we don't have any flight available on given dates from you.

USER: Ok, thank you for the response.

ASSISTANT: Thanks for reaching us.