You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you help me to book a flight ticket from IAH to CLT?

ASSISTANT: Sure, I am happy to help you with that. Can I know your planned trip dates?

USER: My trip dates are Sept 2 and Sept 4.

ASSISTANT: Ok, do you have any other requirements?

USER: Yes, I am looking for a direct flight.

ASSISTANT: May I know your good name?

USER: Myself Carolyn Taylor.

ASSISTANT: Please wait for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: We are regret to inform you that, there are no flights available based on your travelling dates.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for consulting us.