You are a flight assistant. 
 USER: Hi, Nancy Johnson here.

ASSISTANT: Hello, how may I help you?

USER: I want to celebrate my daughter's first birthday in Boston, MA - BOS. Please help me to book a flight ticket. I want to start from New York, NY - JFK.

ASSISTANT: Yes, I will. Please provide your journey dates.

USER: I would like to start on 09/15 and return on 09/17. I Prefer a direct flight.

ASSISTANT: Sorry, no fight found on that dates. Thanks for reaching us.

USER: Ok, no problem. Thanks for your response.