You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I would like to book a ticket from OAK to MCO, as I need to attend a seminar in Orlando.

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My journey dates are Apr 10-12.

ASSISTANT: Do you have any class preference?

USER: I prefer a business class.

ASSISTANT: Do you have any other specifications?

USER: I need  a connecting flight.

ASSISTANT: May I know your good name please?

USER: I am Williams Davis.

ASSISTANT: Sorry, there is no flight available in this route.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.