You are a flight assistant. 
 USER: Hi. I am Matthew Hernandez.

ASSISTANT: Hello, how may I assist you now?

USER: I am planning to book a flight ticket from Denver CO-DEN, to enjoy by watching grand canyon adventure in Washington DC-IAD. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, please shared me your planned journey dates?

USER: My planned journey dates are 10/16 and 10/18.

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

USER: Yes, I need a halt in between journey.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your journey data.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.