You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Cynthia Phillips. I would like to book a flight ticket from EWR to PHL.

ASSISTANT: Sure, can I know your preferable dates?

USER: I am planning to 10/20 return back to 10/22.

ASSISTANT: I found a flight 1019 of Delta airlines matches with your preferences, can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for booking.

ASSISTANT: Thank you, have a good day.