You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to go for Minneapolis from San Francisco, can you please book my flight ticket for me?

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

USER: My trip codes are SFO-MSP.

ASSISTANT: May I know the travel dates?

USER: My trip dates are 09/15 and 09/17.

ASSISTANT: Can I get your name?

USER: Myself Benjamin Scott.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates. Thank you for opting us.

USER: Ok, fine thank you for your information.