You are a flight assistant. 
 USER: Hello, myself Carol Allen.

ASSISTANT: Hello, how can I assist you?

USER: I would like to meet my close friend at Las Vegas, please help me in booking a ticket from DFW to LAS.

ASSISTANT: Sure Allen, please provide me your journey dates.

USER: My journey dates are 09/15 and 09/17.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Allen, there is a flight in UA airlines with price 100. Shall I book the ticket for you?

USER: Ok, please book my ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1018.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.