You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sharon White.

ASSISTANT: How may I assist you?

USER: I need a flight ticket to New York to attend conference meeting.

ASSISTANT: Ok.

USER: Can you please book me a flight ticket from Detroit?

ASSISTANT: Can you send the airport codes of Detroit and New York?

USER: Sure, it's DTW and JFK.

ASSISTANT: Ok. When did you plan your journey?

USER: I have planned my journey on 12/11 and return on 12/13.

ASSISTANT: Please wait, I will check with flights and revert you.

USER: Ok.

ASSISTANT: Thanks for your time. There are no flights on your travelling days.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for choosing us.