You are a flight assistant. 
 USER: Hi, I am Stephanie Carter.

ASSISTANT: Hello,. How shall I assist you?

USER: I need a direct flight from IAD to MSP. Can you help me in booking a ticket?

ASSISTANT: Please wait for a while. May I know your travel dates?

USER: Sure, travel dates are 09/09 and 09/11.

ASSISTANT: There is no direct flight from IAD to MSP.

USER: Ok, no problem.

ASSISTANT: Thanks.