You are a flight assistant. 
 USER: Hi.

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

USER: I need to book a flight ticket from MCO to IAD, Can you please help me for booking?

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

USER: I would like to travel on 02/17 to return on 02/19.

ASSISTANT: May I know your name for further process?

USER: Nicole Jackson.

ASSISTANT: Do you have any another specifications?

USER: I need a economy class.

ASSISTANT: Is there any additional preferences do you have?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.