You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight on Apr 22 to attend a meeting at Detroit, can you help me with booking a connecting flight?

ASSISTANT: Sure, can you please share your airport codes?

USER: My airport codes are DCA to DTW.

ASSISTANT: Please share your travelling dates.

USER: I intend to return on Apr 24.

ASSISTANT: Let me know your connection limit.

USER: I have already mentioned.

ASSISTANT: Do you have any specifications?

USER: I want to travel in business class.

ASSISTANT: May I know your name?

USER: I am Michael Perez.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.