You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: I am Amanda Nelson. I want meet my father who live in Denver, so please help me for booking a flight ticket?

ASSISTANT: Sure, please provide me your journey details?

USER: Ok, my source and destination codes are from BOS to DEN. Make sure that I need direct flight.

ASSISTANT: Could you provide me your journey dates?

USER: My travel dates are from 12/18 to 12/20.

ASSISTANT: Sorry, no direct flights are available.

USER: Ok, not a problem.

ASSISTANT: Thank you for availing us.

USER: Thank you.