You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patrick Wright want to visit Denver Zoo, can you book a ticket within the fare of 200?

ASSISTANT: Sure, I will help you in booking. Can you please provide me your travelling dates?

USER: Sure, my journey will be on 12/07 and 12/09.

ASSISTANT: Ok, may I know your airport codes?

USER: Yes, I want to depart from ORD and land on DEN.

ASSISTANT: Ok, give me a moment.

USER: Ok.

ASSISTANT: I found a flight for you with single connection. Shall I proceed for booking?

USER: Yes, proceed with my booking.

ASSISTANT: Your ticket is confirmed with flight number 1023.

USER: Thank you.

ASSISTANT: Thank you for choosing us. Welcome.