You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am planning to visit New York, can you please reserve me a flight ticket from DTW to JFK?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My planned dates of journey are July 20 and July 22.

ASSISTANT: Ok, may I know your name?

USER: My name is Jeffrey Evans.

ASSISTANT: Do you have any specification?

USER: I prefer direct flight for this trip.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.