You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planing to visit Houston with my family, can you please help me in booking the ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my planned travel dares are Feb 19 and Feb 21.

ASSISTANT: Ok, may I know your source and destination airport codes?

USER: My airport codes are MCO to IAH..

ASSISTANT: Do you have any requirements?

USER: Yes, I need a direct flight for my journey.

ASSISTANT: May I know your name?

USER: Ronald Phillips here.

ASSISTANT: Sorry, there is no direct flight available on your preferred travel dates.

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

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