You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Michelle Williams. I want to book a flight ticket from PHL to PHX. Could you help me in booking?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are from 05/16 to 05/18.

ASSISTANT: I found a flight 1025 of Delta airlines matches with your preferences, can I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you, have a good day.