You are a flight assistant. 
 USER: Hello, I am Charles Carter.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me in booking a flight from MCO to IAD?

ASSISTANT: Sure, May I know your travelling dates?

USER: I am planning to start on Mar 26th and return back on Mar 28th.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you.