You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you help me in booking my flight ticket from MCO to MSP?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: My trip dates will be Oct 20th to Oct 22nd.

ASSISTANT: May I know your name for further process?

USER: I am David Davis.

ASSISTANT: Is there any additional preferences do you have?

USER: I prefer a class economy.

ASSISTANT: Do you have any another specifications?

USER: I prefer a connecting flight.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.