You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you.

USER: I am Brandon Davis.

ASSISTANT: Ok.

USER: Can you help me in booking the ticket from BOS to DFW?

ASSISTANT: Ok, may I know your travelling dates?

USER: My planning dates are from 06/17 to 06/19.

ASSISTANT: Sorry, no flights found.

USER: That's fine.

ASSISTANT: Thank you for opting us.

USER: Thank you for your immediate response.