You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Jennifer Hernandez. I want to attend a small conference meeting to BOS. Please help me in booking my flight from ORD.

ASSISTANT: Fine, let me know your journey dates too.

USER: My journey dates are from 06/15 to 06/17.

ASSISTANT: Sorry, there is no flight available on your route.

USER: It's ok, thank you for your help.

ASSISTANT: Thanks for choosing us, have a good day.