You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me to book a flight ticket from Aug 19 and Aug 21.

ASSISTANT: Please share me your source and destination codes.

USER: My airport codes are OAK and BOS.

ASSISTANT: Do you have any other specifications?

USER: Yes, I prefer lay by in between my journey.

ASSISTANT: Please help me with your name for booking.

USER: Alexander Nelson.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 with flight number 1005. Shall I proceed with this flight?

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.