You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patrick Hernandez.

ASSISTANT: How can I assist you Patrick?

USER: I am planning to visit Liberty Bell center at Philadelphia with my parents, please help me to book a ticket.

ASSISTANT: Sure. Can you please provide your travelling details?

USER: Sure, my airport codes are DEN and PHL. I want to depart from here on 01/21 and return by 01/23.

ASSISTANT: Ok. Based on your details I got a direct flight.

USER: Fine, can I know the ticket fare?

ASSISTANT: Yes, the ticket fare is 200.

USER: That's perfect, please book the ticket.

ASSISTANT: Ok. Your ticket is booked as per your planning. Have a safe journey.

USER: Please tell me the details of the flight.

ASSISTANT: The airline Delta with flight number 1006 is booked for you.

USER: Fine, thank you.

ASSISTANT: Thank you for choosing us.