You are a flight assistant. 
 USER: Hi. Timothy Hernandez here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book me a ticket from LAS to JFK?

ASSISTANT: Sure, can I know your preferable dates?

USER: Sure, here are my preferred travel dates 01/20 and 01/22.

ASSISTANT: I found a flight 1004 of Delta airlines matches with your preferences, can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is booked..

USER: Thank you.

ASSISTANT: Thank you.