You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to attend a seminar from AZ-PHX to PA-PHL.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: The travelling dates are from 08/19 to 08/21.

ASSISTANT: Ok, may I know your name?

USER: Sure, my name is Dorothy Carter.

ASSISTANT: Sorry, no flights found on your details.

USER: Ok, It's fine.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.