You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Cynthia Roberts, I want to visit DFW for my business meeting. Can you book my ticket from BOS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 06/29 to 07/01.

ASSISTANT: Sorry Cynthia, there is no flight available for you on your provided dates.

USER: That's fine. Thank you for your time.

ASSISTANT: You are welcome.