You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure., I am perky to help you. Can you please let me know your travelling dates?

USER: My travel dates are July 23 and July 25.

ASSISTANT: Kindly mention your respective airport codes.

USER: My airport codes are AUS and OAK.

ASSISTANT: Do you have any lay by in between journey?

USER: Yes, I prefer connecting flight for this trip.

ASSISTANT: Is there any other specifications for you?

USER: No.

ASSISTANT: Can I have your good name?

USER: I am Susan Martin.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.