You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Mark Campbell. I want to book a plane ticket to New York, NY - LGA. Can you please book a ticket on 01/11?

ASSISTANT: May I know your origin airport code and return date?

USER: My origin is LAS. I need to return on 01/13.

ASSISTANT: We found a flight on your details with airline Delta, flight number: 1025.

USER: Please book this.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking my ticket.

ASSISTANT: Thanks for choosing us.