You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: Can you help me to book a direct flight?

ASSISTANT: Sure, let me know your travel dates?

USER: My travelling dates are June 13 and 15.

ASSISTANT: May I know your airport codes?

USER: My airport codes are CLT and IAD.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Can you share your name please?

USER: My name is Ashley Allen.

ASSISTANT: Sorry, no flights found as per your request.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for contacting us.