You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Moore.

ASSISTANT: How can I assist you at this moment?

USER: I like to travel on 10/10.

ASSISTANT: Do you want me to book a flight ticket on this date?

USER: Yes, please and I will be back on 10/12.

ASSISTANT: Sure, I will help you with that. Can I have the airport codes of your journey locations?

USER: My nearest airport codes are from DEN to SEA.

ASSISTANT: Please be hold on for a moment.

USER: Sure.

ASSISTANT: Sorry Moore, no flight is available to you on your dates.

USER: Oh! That's ok. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a great day.