You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Williams Gonzalez here. I would like to buy a ticket from PHL to LAX.

ASSISTANT: On which date you are planning to visit ?

USER: I prefer leaving on 12/24 to 12/26.

ASSISTANT: Sure, give me a second. I found a flight for you.The price is 200 and flight number is 1014. Can I proceed the booking.

USER: Proceed for booking.

ASSISTANT: I confirm your ticket successfully.

USER: Thanks for helping.

ASSISTANT: Thank you for providing me with your details.