You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Ronald Rodriguez here. I would like to travel from IAD to CLT, can you help me to make a flight reservation?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are 09/04 and 09/06.

ASSISTANT: Do you have any specifications?

USER: I need direct flight.

ASSISTANT: Sorry there is no flight available for you as per your requests.

USER: Thanks for your help and information.

ASSISTANT: Thank you for reaching us.