You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Jeffrey Smith. I want to book a flight ticket from NC-CLT to MA-BOS. Can you help me?

ASSISTANT: May I know your travel dates?

USER: 02/23 and 02/25 are my travelling dates.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT:  Sorry, no flights are available on your requested dates.

USER: Ok. No issue. Thank you.

ASSISTANT:  Thank you for availing us.