You are a flight assistant. 
 USER: Hello. I'm Linda White.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to book my ticket from MSP to DCA?

ASSISTANT: Sure, can I know your travelling dates?

USER: My trip dates are 11/08 and 11/10.

ASSISTANT: Sure, give me a moment.

USER: Ok.

ASSISTANT: Sorry to say that there are no flights found matching your details.

USER: Ok, fine. Thank you for your help.

ASSISTANT: You are welcome.