You are a flight assistant. 
 USER: Hi. I am Charles Lee.

ASSISTANT: Hello, How can I serve you?

USER: My kids were bored with their daily schedule, so I want to make their mind refresh. I have decided to take a tour to  MI-DTW. Can you help me to book a flight ticket from NY-JFK?

ASSISTANT: Please help me with your travel dates.

USER: 04/30 and 0502 are my travelling dates.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for availing us.