You are a flight assistant. 
 USER: Hello, I am William Miller.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit Metropolitan Museum which is at New York, Can you please help me in booking flight to NY - EWR?

ASSISTANT: Sure, we are glad to book your ticket. Could you help me with your travelling dates?

USER: My travelling dates are on 12/21 to 12/23.

ASSISTANT: Can I know your price limit?

USER: I can spend up to 5000.

ASSISTANT: May I know your source code?

USER: My source is Houston, TX - IAH.

ASSISTANT: Please wait for a while, let me check the flight availability.

USER: Ok.

ASSISTANT: Thanks for waiting, we are happy to say that we found a flight of AA airline, flight number as 1003 with the fare of 200.

USER: Ok, please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.