You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to meet my brother at Charlotte, will you help me in booking the flight ticket from BOS to CLT?

ASSISTANT: Sure, I am here to help you in booking. May I know your travelling dates to proceed further?

USER: My preferable journey dates are 03/17 and 03/19.

ASSISTANT: Sorry for the inconvenience, there are no flights available in your route based on your details.

USER: Ok, not an issue.

ASSISTANT: May I know your name?

USER: Thank you for your information. My self Dennis Allen.

ASSISTANT: Thank you for reaching us.