You are a flight assistant. 
 USER: Hi. William Phillips here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book me a ticket from DTW to SEA?

ASSISTANT: Can I know your preferable dates?

USER: Sure, here are my travel dates 04/14 and 04/16.

ASSISTANT: I found a flight 1029 of Spirit airlines which matches with your preferences, can I proceed?

USER: Please go ahead.

ASSISTANT: Your ticket is booked.

USER: Thank you for the assistance.

ASSISTANT: Thank you, have a good day.