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

ASSISTANT: Hello, how can I help you?

USER: I want to fly from SFO to LGA, can you please help me to book a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: Sure, the trip dates are 11/10 to 11/12.

ASSISTANT: Do you have any specifications?

USER: I need a halt with fare 500.

ASSISTANT: Thanks for your details, we found 1001 AA airline with single connection and price of 100. Shall I proceed with it?

USER: Ok, book the ticket.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.