You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Paul Wright. Can you help me in booking the ticket from CLT to DFW?

ASSISTANT: Sure, I will help you with this.

USER: Ok.

ASSISTANT: Can you please share your preferable journey dates?

USER: My planning dates from 10/14 to 10/16.

ASSISTANT: Give me a moment please.

USER: Ok.

ASSISTANT: Paul Wright, there are no flights available on your provided dates due to heavy bookings.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for utilising our service.