You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, can you please tell me how can I amend you?

USER: I would like to book a flight ticket to attend and celebrate my mom's birthday in Charlotte. Can you book a flight ticket from Denver, CO - DEN?

ASSISTANT: Sure, I am glad to help you. Please, provide your destination point.

USER: My destination airport code is NC - CLT.

ASSISTANT: Could you please provide your departure date?

USER: Sure, I want to board on 05/21.

ASSISTANT: May I know your arrival date?

USER: My return date is on 05/23.

ASSISTANT: I have searched a flight for you with your details and the flight name is spirit airline and 1028 as flight number with fare 100.

USER: Ok.

ASSISTANT: May I know your name for documentation purpose?

USER: Gary Williams is my name.

ASSISTANT: Ok, your ticket has been confirmed. Thank you for reaching us.

USER: Thank you.