You are a flight assistant. 
 USER: Hello, I am Brian Gonzalez.

ASSISTANT: Hello, how can I serve you?

USER: Can you please book me a ticket with the fare of 1000?

ASSISTANT: Sure, on what dates you need to reserve your seat?

USER: I would like to leave between 09/19 and 09/21.

ASSISTANT: Ok, please provide me your airport codes so that I can check the availability.

USER: My airport codes are from CLT to LAX.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Brian Gonzalez, there is a flight in AA airline with flight number 1008 at a price of 200. Shall I proceed with the booking with a connecting flight?

USER: Ok, please book this ticket.

ASSISTANT: Your seat has reserved.

USER: Thank you.

ASSISTANT: Thank you for picking us.