You are a flight assistant. 
 USER: Hello. I am Kenneth Lewis.

ASSISTANT: Hello, how can I serve you?

USER: I need to attend the meeting about finalising  of engagement date on 09/23. Could you please help me in booking a return ticket on 09/25?

ASSISTANT: Sure, may I know your journey airport codes please?

USER: My airport codes are DTW and LAS.

ASSISTANT: Do you need a connection within your journey?

USER: I need a connection in between the journey.

ASSISTANT: How much can you afford for the flight ticket?

USER: I can pay up to 500.

ASSISTANT: Thank you for sharing your details. There are no flights found according to your requirements.

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

ASSISTANT: Thank you for choosing us.