You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend to my business meeting in Charlotte, for that I need help from you to book a flight ticket.

ASSISTANT: Sure, may I know your dates of travel and corresponding airports code please?

USER: Sure, I want to travel from ATL to IAH. My travel dates are 03/19 and 03/21.

ASSISTANT: Ok, please wait for a moment to check the available ticket for you.

USER: Sure.

ASSISTANT: Sorry, for the inconvience because there is no flights available as per your details.

USER: Then its ok.

ASSISTANT: May I know your name please?

USER: I am Linda Turner.

ASSISTANT: Thank you Turner, for consulting us.

USER: Thanks for valuable information.