You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need your help to book a ticket from ORD to DEN.

ASSISTANT: Sure, I want your name for booking the ticket. Can I know your name ?

USER: My name is Virginia Martinez.

ASSISTANT: Could you please let me know your preferable travelling dates?

USER: My departure date should be 05/19 and return date should be 05/21.

ASSISTANT: Do you have any restrictions in price and connection limit?

USER: My price limit should not exceed 500 and connection should be zero.

ASSISTANT: Yes, Virginia there is a flight with all your requirements. Flight 1011 with 0 connection costs 100 in Delta airline.

USER: Please confirm the booking.

ASSISTANT: Your ticket booking is confirmed. Thank you for choosing us.

USER: Thank you for the help.

ASSISTANT: Have a safe journey.