You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Please book a flight ticket from EWR to MCO.

ASSISTANT: Sure. I will help you. Can I know your name?

USER: Nancy Parker here.

ASSISTANT: Thank you. May I know your travel dates?

USER: My trip dates are 03/04 and 03/06.

ASSISTANT: Sure. Is there any class preference?

USER: No.

ASSISTANT: Ok, please wait for a moment. Sorry, there are no flights available on your preferred travel dates.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome and thank you for contacting us.