You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Laura Mitchell here.

ASSISTANT: How may I assist you today?

USER: Can you reserve a stopover flight for my business trip to Washington?

ASSISTANT: Sure, may I know your travelling airport codes?

USER: The airport codes are from AUS to DCA.

ASSISTANT: Please mention your travelling dates.

USER: My travel dates are from Oct 25 to Oct 27.

ASSISTANT: Any other specifications needed?

USER: No.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT:  Sorry, there are no flights found on given dates.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching our service.