You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please book a ticket from IAD to MSP to meet my sister.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are Nov 24 and Nov 26.

ASSISTANT: Do you have any specifications?

USER: I want a direct flight.

ASSISTANT: May I know your name?

USER: I am Kevin Hernandez.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.