You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David King.

ASSISTANT: How may I help you?

USER: I want to attend a wedding in Charlotte. Can you book a ticket from PHL to CLT?

ASSISTANT: Please mention your travel dates?

USER: I want to fly on 07/26 and 07/28.

ASSISTANT: There is a flight with flight number 1000 with price is 200, can I proceed booking your ticket?

USER: Proceed to booking.

ASSISTANT: Your booking is done in Spirit airlines.

USER: Thank you for your help.

ASSISTANT: Most welcome.