You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Amy Clark here. Can you find a direct flight for me?

ASSISTANT: Sure, I am here to help you to book a flight ticket but I need your travel dates.

USER: Ok, my travelling dates should be 05/09 and 05/11.

ASSISTANT: May I know your travelling airport codes?

USER: Fine, my locations are from DCA to DFW.

ASSISTANT: Amy Clark sorry, I could not find any direct flight with your travel dates.

USER: It's ok, thanks for your information.

ASSISTANT: Thanks for choosing us.