You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Nancy Roberts. I want to  book a ticket from PHL to MSP. Could you help me?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travel dates are from 02/25 to 02/27.

ASSISTANT: Please wait a minute.

USER: OK.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for availing us.