You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Please book a ticket from Denver, CO-DEN to Washington DC-DCA.

ASSISTANT: Sure, we are here to help you. Let me know when your willing travel?

USER: Journey dates are from 12/30 to 01/01.

ASSISTANT: May I know your name to book a flight ticket?

USER: I am Ashley Edwards.

ASSISTANT: Do you need any halts in between your journey?

USER: Please provide single halt.

ASSISTANT: Ok, wait for some time I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no flights found on your requested details.

USER: Thank you.

ASSISTANT: Thanks for choosing us.