You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Richard Rodriguez. Can you please book me a flight ticket from LAX to OAK to meet my old friends?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 04/19 to 04/21.

ASSISTANT: How much you afford for ticket?

USER: I can afford up to 500.

ASSISTANT: Wait for a while.

USER: Ok.

ASSISTANT: We found a flight on AA airline, flight number as 1000 with the fare of 100. Can I proceed?

USER: Ok, please book this ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.