You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Laura Miller.

ASSISTANT: How can I help you Laura?

USER: Can you check whether any flight is available on 01/14 to 01/16?

ASSISTANT: Sure Miller. Can you please tell us your airport codes?

USER: I will fly from IAD and land at DEN.

ASSISTANT: Hold on for a moment please.

USER: Sure.

ASSISTANT: Sorry Miller, I did not find any flight for you as per your requested dates.

USER: No issue, thank you for checking.

ASSISTANT: You are welcome, have a nice day.