You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ryan White here.

ASSISTANT: How may I help you at this moment?

USER: I need to travel from DTW to DCA, can you help me in doing that?

ASSISTANT: Sure, I am here to help you with that. Can I know your journey  dates?

USER: My journey dates are 04/02 to 04/04.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight which returns in evening time.

ASSISTANT: Do you have any other airline preferences?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I already mentioned you that I need a connecting flight.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.