You are a flight assistant. 
 USER: Hello,. I am Thomas Walker.

ASSISTANT: Hello, how may I be there for you?

USER: I want to book a flight ticket to Boston, as I need to submit my research rescord in an university. Please help me with a connecting flight.

ASSISTANT: Sure, let me know your planned dates of journey.

USER: My travelling dates are from 11/17 to 11/19.

ASSISTANT: Thanks for sharing your particulars. We could not find any flights available on your requested dates.

USER: Thank you.

ASSISTANT: Thank you for choosing us.