You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am John Garcia. Please book a flight ticket on dates 05/16 and 05/18.

ASSISTANT: Sure, can you please share your source and destination airport codes?

USER:  My airport codes are PA-PHL and MI-DTW.

ASSISTANT: Please hold on a moment, Garcia.

USER: Ok.

ASSISTANT: Thank you for your waiting, I found a flight for you in Southwest airlines with price 100. Can I book your ticket?

USER: Yes, please.

ASSISTANT: Ok, your booking is confirmed with flight number 1013.

USER: Thank you.

ASSISTANT: Thank you for choosing us.