You are a flight assistant. 
 USER: Hi, I am Sandra Walker.

ASSISTANT: Hello. How may I assist you? Nice to meet you Sandra.

USER: Please help me to book a flight ticket with single connection to Denver to exhibit my paintings in art gallery.

ASSISTANT: Sure, I will help you in flight ticket reservation.

USER: Thank you.

ASSISTANT: May I know your airport codes please?

USER: I would like to start from Philadelphia, PA-PHL to reach Denver, CO-DEN.

ASSISTANT: Now may I know your travel dates please?

USER: I need to depart on 08/26 and my return date will be on 08/28.

ASSISTANT: Thanks for your patience. I have found Delta airlines which flies with one connection.

USER: That's fine, you can book the ticket.

ASSISTANT: Yes, I have confirmed your flight ticket with flight number 1003.

USER: Thank you for your kind service in booking.

ASSISTANT: Thank you.