You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit the cathedral basilica of saint peter and Paul which is located in Philadelphia, PHL. Can you avail me to book a flight ticket?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travel dates are Dec 21 and 23.

ASSISTANT: Ok, please share your name.

USER: Christopher Harris here.

ASSISTANT: Let me know your connection limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any specification?

USER: No.

ASSISTANT: Ok, may I know your source code?

USER: I want to take off from Denver, DEN.

ASSISTANT: Here, I found a flight for you with 1 stopover in economy class and it costs you 200. Can I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your booking is done with flight 1015 in AA airlines.

USER: Thanks for your kind assistance.

ASSISTANT: Thank you for reaching us, have a safe flight.