You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Benjamin Evans.

ASSISTANT: How may I help you?

USER: I would like to go for a Nut Shell Bike Tour with my cousin's in Austin, TX - AUS. Could you please help me in booking a flight ticket within the price of 500?

ASSISTANT: Please share your travelling dates.

USER: My travel dates are 04/16 - 04/18.

ASSISTANT: Help me with your source point.

USER: I wish to board from Minneapolis & St. Paul, MN - MSP.

ASSISTANT: Unfortunately, there are no flights available for you.

USER: Not an issue, I will checkout with the another airlines.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.