You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I amend you today?

USER: I got an offer to watch a live event at San Francisco, so please help me with booking a flight ticket with price within 500.

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: Can you please share your journey dates that you prefer to travel?

USER: Sure, I would like to go on 11/22 and intend to back on 11/24.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: Yes, I will take off from PHL and land on SFO.

ASSISTANT: May I know your name please?

USER: Sure, Anna Thomas is my name.

ASSISTANT: We found a connecting flight with AA airlines, flight number 1023 and the fare of 100. Shall I proceed?

USER: That's perfect for me, please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing us.