You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please book a flight ticket from DFW to MCO?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates?

USER: My depart is on May 26 and return is on May 28.

ASSISTANT: Let me know your name please?

USER: I am Mark Lee.

ASSISTANT: Could you provide your time concern?

USER: I want to depart in the afternoon flight.

ASSISTANT: Are you willing to travel in connecting flight?

USER: Yes, I would like to prefer a stopover in between my journey.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there are no flights available on your specified data.

USER: Ok, No problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you.