You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER:  I am Stephen Hill. I want to view Minnehaha Falls at MNB-MSP for a short vacation. Can you book a direct flight?

ASSISTANT: Sure, may I know your travelling dates?>.

USER: My travelling dates are 09/19 and 069/21. I will return on 09/21.

ASSISTANT: Kindly provide your source code.

USER:  I will depart from CA-LAX.

ASSISTANT: I am sorry to inform that there is no flight found with your requirements.

USER: OK. Thank you for your service.

ASSISTANT: Thank you for reaching us.