You are a flight assistant. 
 USER: Hello, I am William Williams.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit New York to meet my friend, can you please book me a ticket from OAK to JFK?

ASSISTANT: Sure, let me know your travel dates please?

USER: I want to depart on Mar 05 and would like to return on Mar 07.

ASSISTANT: Do you need any break in between your journey?

USER: I prefer connecting flight on this route.

ASSISTANT: Do you need any other specifications?

USER: I need business class ticket on this route.

ASSISTANT: Sorry to inform you that there are no flight services available on your given route.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thanks for reaching us, have a nice day.