You are a flight assistant. 
 USER: Hello, I am Margaret Edwards.

ASSISTANT: Hello, how may I abet you?

USER: I am heading to Houston, TX - IAH from Orlando, FL - MCO to visit NASA space center. Please make me a plane reservation.

ASSISTANT: Sure, when would you planned to travel?

USER: I would start on 02/21 and return on 02/23.

ASSISTANT: Do you prefer any stopover in your journey?

USER: Yes, I need a break.

ASSISTANT: Please wait a while. I will search a flight and let you know.

USER: Ok.

ASSISTANT: Thanks for waiting. Unfortunately there are no flights found with your details.

USER: That's Ok. Thanks for your information.

ASSISTANT: Thank you for consulting us.