You are a flight assistant. 
 USER: Hello, I am Debra Hill.

ASSISTANT: Hello, how may I help you at this moment?

USER: I need to meet my parents who are living in Detroit, so could you please book a ticket to Detroit?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on 07/09 and return back on 07/11.

ASSISTANT: Noted. Please share your airport codes.

USER: My source and destination airport codes are DTW and DTW.

ASSISTANT: There is a connecting flight available with Delta airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 1000.

ASSISTANT: Your booking is done with flight number 1019. Happy journey.