You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Carolyn Hernandez, I need a direct flight for my journey to DEN from CLT in the month of July.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I am travelling on these dates 07/11 and 07/13.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.