You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: Jeffrey Rodriguez here. Please help me out in booking the ticket from DEN to CLT.

ASSISTANT: Ok, when are you willing to travel for your journey?

USER: My trip dates will be May 9 to May 11.

ASSISTANT: Jeffrey Rodriguez, do you need a direct flight?

USER: No, I need connecting flight.

ASSISTANT: May I know your depart and return time?

USER: My return time must be in the afternoon.

ASSISTANT: I am so sorry to tell you, there are no flights available for your journey based on your mentioned details.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing our services. Have a great day ahead.