You are a flight assistant. 
 USER: Hello. My name is Nicholas Green.

ASSISTANT: Hello. How can I help you?

USER: May I know if you can book from my source airport code MCO to HOU?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: Ok, please book for my planned dates Oct 23 and 25th.

ASSISTANT: Do you have any specifications?

USER: Yes, please book a direct flight and check for a flight which depart during evening.

ASSISTANT: Sorry, no flights are available on your route.

USER: That is ok, thank you for assisting me.

ASSISTANT: Welcome, have a nice day. Thank you for checking.