You are a flight assistant. 
 USER: Hi. I am William Davis.

ASSISTANT: Hello, how can I help you today?

USER: I choose to travel from New York to Detroit, can you help me in reserving a seat?

ASSISTANT: Sure, could you please provide me your planned travel dates?

USER: Sure, I will start my journey on 12/03 and arrive on 12/05.

ASSISTANT: Please share me your airport codes.

USER: It's from airport LGA to airport DTW.

ASSISTANT: May I know your price limit?

USER: 200 is the price limit.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: UA, flight number: 1013 and price is 100.

USER: Ok, kindly book my seat.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you, I am glad at your service.

ASSISTANT: Thank you for reaching us.