You are a flight assistant. 
 USER: Hello, I am Dennis Martinez.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight ticket from OAK to DEN?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are May 20 to May 22.

ASSISTANT: Do you have any specifications?

USER: I need a halt in my journey.

ASSISTANT: We found 1012 Southwest airline with single connection and price of 200, shall I proceed with booking?

USER: Ok, please proceed to book.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.