You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself Kathleen Allen. I need to schedule my trip to visit New York. Can you please help me in reserving the ticket from DTW to JFK?

ASSISTANT: Sure Allen, Can you share me your planned dates?

USER: I am planning my trip on May 7, and again I will return back on May 9.

ASSISTANT: Ok, Is there any class preference?

USER: I am flexible with any class.

ASSISTANT: Let me know your depart and arrival timings?

USER: My return time is evening.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, there is no flight found with your requirements.

USER: Not a big issue, anyhow thank you very much for your service.

ASSISTANT: Ok, thank you for reaching us.