You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: My name is Gregory Mitchell. I want to go to Rolling Pub Detroit on 09/21, by booking a flight ticket under the price limit of 200. Could you aid me in this?

ASSISTANT: Sure, May I know the return date?

USER: Return date is on 09/23.

ASSISTANT: Please help me with your journey codes.

USER: Airport codes are from Orlando, MCO to Detroit, DTW.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for reaching us.

USER: No problem. Thank you for being helpful.