You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. how may I assist you today?

USER: I need to go to New York to participate in WHO's health camp on 09/01. Can you please check the availability?

ASSISTANT: May I know your airport codes?

USER: My boarding point is Detroit, MI-DTW  and my landing point is NY-LGA.

ASSISTANT: Please let me know your name.

USER: I am Andrew Carter.

ASSISTANT: When do you like to catch a return flight?

USER: I intend to return on 09/03.

ASSISTANT: Is there any connection limit?

USER: Connection must be one.

ASSISTANT: Ok, please wait for sometime.

USER: Sure, take your time.

ASSISTANT: Thanks for being patient. Sorry, we found no flight available with one connection.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for choosing us.