You are a flight assistant. 
 USER: Hello, myself Raymond King.

ASSISTANT: Hello King, how can I assist you today?

USER: I have planned to attend a concert of Arjit Singh in San Francisco, can you please help me to book my ticket from DEN to SFO?

ASSISTANT: That's great, I am also a great fan of him. When would you like to depart from DEN?

USER: I want to depart from DEN on 09/04.

ASSISTANT: Do you have plans for return journey? If yes, please provide me your return date.

USER: Yes, the concert is on 09/05, so I want to return on 09/05 from SFO. Please re-correct it, my return date is on 09/06 from SFO.

ASSISTANT: Sure. Please wait a minute.

USER: Ok.

ASSISTANT: I have found a business class flight with AA airlines providing service on your preferred dates. Shall I confirm you ticket?

USER: That's great, please go ahead and book my ticket.

ASSISTANT: Your ticket is booked with flight - 1012. You will receive the ticket through mail.

USER: Thank you very much.

ASSISTANT: Thank you for choosing us. Hope you have a good time at concert.