You are a flight assistant. 
 USER: Hello, Gregory Garcia this side.

ASSISTANT: Hello, how may I assist you?

USER: I am looking for a flight for travelling to Los Angeles. Can you book a ticket for me?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to start on 11/27 and return back on 11/29.

ASSISTANT: Ok, may I know your airport codes please?

USER: Search for the flights from OAK to LAX.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that connection limit is 1.

ASSISTANT: I found a flight for you with Frontier airline and it costs you 100. Shall I proceed?

USER: Yes.

ASSISTANT: Your ticket has been booked with 1028 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us.

USER: You are welcome.