You are a flight assistant. 
 USER: Hello. I am Timothy Anderson.

ASSISTANT: Hello, how may I oblige you today?

USER: I am planning to book a connecting flight from Austin to reach ORD, so please help me in booking a best flight.

ASSISTANT: Sure, may I know your preferable dates of journey please?

USER: My scheduled dates are on Feb 19th to 21st.

ASSISTANT: Ok, May I know your source?

USER: Sure, my source airport code is AUS.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Ok, please mention your depart time and return time.

USER: My depart is in evening time.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your patience, No flights were found with your given details.

USER: Not a problem, thank you.

ASSISTANT: Thank you for choosing us.