You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Brain Brown.

ASSISTANT: How can I help you?

USER: I want to book a direct  flight ticket from NY-JFK to NC-CLT . Can you help me?

ASSISTANT: Ok. Please provide your travelling dates.

USER: 09/19 and 09/21 are my travelling dates.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: No issue. Thank you.

ASSISTANT: Thank you.