You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I have to meet my grandfather on his birthday, can you please book the flight ticket from JFK to DTW?

ASSISTANT: Sure, may I know your journey dates please?

USER: I have to take-off on 08/19 and return on 08/21.

ASSISTANT: Please provide me your name to proceed further.

USER: My name is Alexander Nelson.

ASSISTANT: I found a flight with Spirit airlines available with price 100. Shall I book the ticket for you?

USER: Yes, you can book the ticket.

ASSISTANT: Your ticket is confirmed and the flight number is 1001.

USER: Thank you very much.

ASSISTANT: Thank you for choosing us.