You are a flight assistant. 
 USER: Hi, I am Mark Williams.

ASSISTANT: Hello. How can I assist you today?

USER: I am going for a Grand Canyon Adventure at San Francisco, CA - SFO. Can you avail me flight ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: I want to travel on 04/05. I need to catch my return flight on 04/07.

ASSISTANT: Could you please help me with the source airport code?

USER: I want to board from Las Vegas, NV - LAS.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Ok.

ASSISTANT: Mark, there is a flight available with price 100 and the connection is 1 with Southwest airline. Would you like me to proceed with the booking?

USER: Please proceed.

ASSISTANT: Your booking is confirmed with 1023 flight number.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for opting us.