You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to schedule my trip to visit Charlotte. Can you please help me in reserving the ticket from OAK to CLT?

ASSISTANT: Can I know your travelling dates?

USER: I would like to travel on Apr 17 and again I will return back on Apr 19.

ASSISTANT: Is there any airline preference?

USER: No, I am comfort to travel in any airlines.

ASSISTANT: Do you have any class preference?

USER: No, I am comfort with any class.

ASSISTANT: Is there any connection limit?

USER: I am planning to travel in single connection flight.

ASSISTANT: Let me know your name.

USER: Myself Frank Wilson.

ASSISTANT: Found ticket with Delta airline for price 1000.

USER: Yes, please go ahead and reserve the ticket.

ASSISTANT: Ticket is booked in business class having flight number 1019.

USER: Thank you very much for reserving the ticket.

ASSISTANT: Thank you.