You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Richard Martin. I need to book a flight ticket from JFK to DEN, Can you please help me for booking?

ASSISTANT: Sure, may I know your journey dates?

USER: I would like to travel on 12/27 to 12/29.

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

USER: You can proceed any connections.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.