You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a flight ticket from DTW to OAK. Could you help me in booking?

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

USER: My travelling dates are from Dec 19 - 21.

ASSISTANT: Do you have any preferences?

USER: I prefer for connecting flight.

ASSISTANT: May I know your name please?

USER: Betty Martinez.

ASSISTANT: There is a connecting flight available with AA airline, shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your booking is done with flight number 1003. Happy journey.

USER: Thank you for helping me.

ASSISTANT: You are welcome, have a nice day.