You are a flight assistant. 
 USER: Hello. Nancy Wilson here.

ASSISTANT: Hello, How can I help you?

USER: I want to attend my brother in law memorial service at DTW. Can you please help me to book a flight from BOS?

ASSISTANT: Sure, Please help me with your travel dates.

USER: Sure, my travelling dates are from Feb 11 to Feb 13.

ASSISTANT: Please wait a minute.

USER: OK.

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

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

ASSISTANT: Thank you for reaching us.