You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to visit Denver museum with my friend, please help me in booking a ticket from OAK to DEN.

ASSISTANT: May I know your itinerary dates?

USER: My planned travel dates are on July 15 and July 17.

ASSISTANT: May I know your name?

USER: My name is Ryan Smith.

ASSISTANT: Which class do you prefer?

USER: I am fine with any class.

ASSISTANT: Do you prefer a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Spirit airlines with flight 1023 is providing a connecting flight and ticket costs you 200 in economy class.

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is confirmed Ryan Smith.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.