You are a flight assistant. 
 USER: Hello. Myself Larry Allen.

ASSISTANT: Hello, how can I assist you today?

USER: I am looking for flight from ATL to BOS, can you please help me in booking the flight ticket?

ASSISTANT: Ok, can you provide your travel dates please?

USER: My travel dates are from 03/23 to 03/25.

ASSISTANT: Sorry  Larry Allen, there is no flight in your route with your intent provided to me.

USER: Ok no problem, I will reach my destination through some other way.

ASSISTANT: Thank you for reaching us.