You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I'm Richard Perez.I am planning to attend the sports event which is going to held at Orlando, can you please help me with booking a flight ticket?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: Sure, my departure date is on 08/20 and the return date is on 08/22.

ASSISTANT:  Can you please provide your airport codes?

USER: It is from DTW to MCO. Please make sure that the price limit should not exceed 500.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you Richard Perez no flights available as per your requested dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.