You are a flight assistant. 
 USER: Hello. I am Betty Perez.

ASSISTANT: Hello, How can I help you?

USER: Could you please help me in booking a flight ticket to MSP with a normal-cost?

ASSISTANT: Sure, May I know the source code?

USER: My source airport code is ORD.

ASSISTANT: Please help me with your journey dates.

USER: My travelling dates are Sept 21 and Sept 23.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.