You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: Will you aid me in booking a ticket from Detroit, DTW?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: I am Lisa Thompson.

ASSISTANT: Can you please help me with your destination code?

USER: Philadelphia, PHL is the destination.

ASSISTANT: When you are willing to travel?

USER: To meet my step mother on the occasion of her birthday, I have to start my travel on 11/21. I would like to back on 11/23.

ASSISTANT: Do you have any other specification?

USER: I need a direct flight. 1000 is my price limit.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found 1016 Delta airlines with the price of 100.

USER: Ok.

ASSISTANT: Shall I proceed with the booking.

USER: You can confirm my ticket.

ASSISTANT: Sure. Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.