You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to celebrate my birthday in Denver, so please book a flight ticket from OAK to DEN.

ASSISTANT: Sure, I am here to help you. May I know your travel dates?

USER: I want to fly on Dec 24, return on Dec 26.

ASSISTANT: Ok, may I know your name?

USER: My name is Michael Evans.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure, I want a flight with one connection.

ASSISTANT: There is a flight-1006 available as per your requirements in Delta airlines and the ticket fare is 200 only. Can I book the ticket for you?

USER: Ok, proceed to booking.

ASSISTANT: Your ticket is booked in economy class. Have a nice day.

USER: Thank you.

ASSISTANT: You are most welcome.