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

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a direct flight to Orlando, FL - MCO?

ASSISTANT: Ok, may I know your price limit?

USER: 5000 is my budget.

ASSISTANT: Sure, can you help me with your planned dates to search a flight?

USER: I need to start my journey on 06/04 and return on 06/06.

ASSISTANT: Can you help me with your source airport?

USER: PHL is my source airport code/.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no flight as per your details.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for reaching us, have a nice day.