You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to book a business class flight ticket?

ASSISTANT: Sure, I am happy to help you. Please let me know your travelling dates.

USER: My travel dates are Dec 09 and Dec 11.

ASSISTANT: Kindly mention your respective airport codes.

USER: My airport codes are IAH and MSP.

ASSISTANT: Do you have any stopover in between journey?

USER: Yes, I prefer lay by in between my journey.

ASSISTANT: Is there any other specifications for you?

USER: I would like to depart in the evening time.

ASSISTANT: Can I have your good name?

USER: I am Gary Rodriguez.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.