You are a flight assistant. 
 USER: Hello, I am Patrick Williams.

ASSISTANT: Hello. How can I help you for today?

USER: I need to visit Microsoft head office located at Seattle. Can you book a ticket for me?

ASSISTANT: Sure, could you please share your journey dates?

USER: Sure, I am planning to start by 12/03 and return by 12/05.

ASSISTANT: Could you please share your airport codes?

USER: Sure, search for the flights flying from SFO to SEA.

ASSISTANT: May I know your price limit?

USER: I can afford up to 200.

ASSISTANT: There is a flight-1011 of Southwest airlines, shall I proceed?

USER: Sure, please proceed.

ASSISTANT: Ok, your booking is done.

USER: Thank you for availing me a ticket.

ASSISTANT: Welcome.