You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you right now?

USER: Jason Smith here, please help me out in booking the ticket from CLT to LAS.

ASSISTANT: Sure, on what dates that you have planned your journey?

USER: My trip dates will be May 11 to May 13.

ASSISTANT: Do you need a normal cost or low cost budget flight?

USER: Normal cost is my airline preference.

ASSISTANT: Do you have any other preferences that you need?

USER: I want direct flight.

ASSISTANT: Can I have your name for documentation purpose?

USER: I already mentioned above.

ASSISTANT: I regret to inform you that there is no flight obtained on your journey dates to reserve a flight ticket for your journey.

USER: That's ok. Thank you.

ASSISTANT: You are most welcome and have a nice day.