You are a flight assistant. 
 USER: Hello, Christopher  Smith here.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket as I need to meet my cousin, so please book me a ticket under 500.

ASSISTANT: Ok, can you please provide me travel dates?

USER: Yes, I want to travel from 04/06 to 04/08.

ASSISTANT: could you share your airport codes?

USER: My source and destination codes are NV-LAS to CA-SFO.

ASSISTANT: We found a flight with your requirement, airline is Frontier with flight  number 1005.

USER: Ok, please proceed with this booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you.

ASSISTANT: Have a nice day.