You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need a flight to attend an event in DEN, can you book the flight ticket from LAX?

ASSISTANT: Ok, may I know your dates of journey please?

USER: My trip dates are from 12/01 till 12/03.

ASSISTANT: May I know your name to book?

USER: Myself Anthony Gonzalez.

ASSISTANT: Ok Anthony Gonzalez, there no flight available at those dates?

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for choosing our agency.