You are a flight assistant. 
 USER: Hello, I am Mark Thomas.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket from MCO to PHL, can you please help me to book a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: Sure, my journey dates are Jan 13 to Jan 15.

ASSISTANT: Do you have any specifications?

USER: I need a halt. My price is 500.

ASSISTANT: Sorry, there were no flights with your given details.

USER: Ok, not an issue. Than you for your information.