You are a flight assistant. 
 USER: Hello. My name is John Davis.

ASSISTANT: Hello, how may I guide you?

USER: I want to travel from DCA to EWR.

ASSISTANT: Ok, can I know your preferable dates?

USER: My preferable dates are from 07/21 to 07/23.

ASSISTANT: I found a flight 1018 of Southwest airlines matches with your preferences, can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your time.

ASSISTANT: Thank you.