You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me in booking a flight from IAH to reach Minneapolis, MSP?

ASSISTANT: Sure, let me know your travelling dates.

USER: My journey dates are from Nov 15 to Nov 17.

ASSISTANT: Do you want connecting flight?

USER: No, I need a direct flight.

ASSISTANT: Do you have any class preference?

USER: I prefer to travel in business class flight.

ASSISTANT: May I know your name please?

USER: My name is Barbara Anderson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.