You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning. May I know your name please?

USER: Good morning, I am Charles Turner.

ASSISTANT: Charles, how can I help you?

USER: I need to fly to Las Vegas, NV-LAS in january month. Is there any chance for flight ticket booking from 01/24 to 01/26?

ASSISTANT: May I know the source code?

USER: My source code is SFO.

ASSISTANT: Wait for a while, I will check the details and get back to you. There is a flight 1005 in AA airline has the price 100. Can I proceed with this booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you.

ASSISTANT: You are welcome.