You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is George Lee.

ASSISTANT: Nice to meet you Lee.

USER: I want to attend my sister's destination wedding in Los Angeles.

ASSISTANT: Oh! that's great to hear.

USER: Can you please book the ticket on dates 12/08 and 12/10?

ASSISTANT: Can I know the journey airport codes please?

USER: My origin airport code is IAD and my destination airport code is LAX.

ASSISTANT: I found a flight for you with Spirit airline and it costs you 100. Shall I proceed?

USER: That's nice. Please proceed.

ASSISTANT: Your ticket has been booked Lee.

USER: Thank you for your response.

ASSISTANT: Thank you for choosing us. Have a safe flight.