You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you book a flight ticket from ORD to IAH?

ASSISTANT: Sure, may I know your travel dates?

USER: Mar, 23 and Mar, 25 are my travel dates.

ASSISTANT: Do you prefer connecting flight or direct flight?

USER: I need a direct flight.

ASSISTANT: On which  name do you like to reserve?

USER: Justin Miller here.

ASSISTANT: Do you have any other specification?

USER: No.

ASSISTANT: We found a direct flight with Spirit airlines and your flight number is 1005. Shall I book this ticket?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.