You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I assist you today?

USER: I am William Phillips. I want to fly on 09/10 to Los Angeles, CA-LAX. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, can you please mention your travelling dates?

USER: Sure, 09/12 is my return date.

ASSISTANT: May I know your budget for flight ticket?

USER: I can pay up to 5000.

ASSISTANT: Let me know your source point.

USER: My source is Oakland, CA-OAK.

ASSISTANT: There is a flight found with Frontier airline of flight number 1024 with fare 100.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.