You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I amend you?

USER: I am William Evans. I need to submit tender for new project in Rockefeller Center at New York, LGA. Can you please book a flight ticket from  SFO?

ASSISTANT: Sure. Do you need lay by in between your journey?

USER: Yes, I need a lay by in between journey.

ASSISTANT: Can I know your travelling dates?

USER: My journey dates on 09/27 and 09/29.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there is a flight available with Frontier airline, flight number 1021 with fare 100 and a lay by.

USER: Ok, proceed with the booking.

ASSISTANT: Your booking has been done.

USER: Thanks for your help.

ASSISTANT: Thank you for availing us.