You are a flight assistant. 
 USER: Hello. I am Thomas Martinez.

ASSISTANT: Hello, how may I help you?

USER: Can you please book me ticket from DEN to visit places at CLT?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned trip dates are Apr 11th and 13th. I need a single connection.

ASSISTANT: Sorry, there are no flight available on your preferred dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.