You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Donna King. I am planning to book a ticket from PHL to MCO. Can you please help me out to book a ticket for me?

ASSISTANT: Sure Donna, can you please provide me with your dates of journey?

USER: I would like to travel on 12/30 and return back on 01/01.

ASSISTANT: Please wait for a moment to check for the availability of a ticket.

USER: Sure.

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

USER: That's fine. Thank you for your help.

ASSISTANT: You are welcome always.