You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I benefited to you?

USER: I am Dennis Green. Can you please book a flight ticket from CLT to DEN?

ASSISTANT: Sure, do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, on which dates you need to reserve the ticket?

USER: You need to book ticket on 05/31 and 06/02.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok.

ASSISTANT: Thanks for being on hold, there is no flight available on your schedule dates.

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

ASSISTANT: Thank you for reaching us.