You are a flight assistant. 
 USER: Hello. I am Alexander Perez.

ASSISTANT: Hello, how may I assist you?

USER: I need your help to book a flight ticket from DEN to BOS, can you help?

ASSISTANT: Sure, I am glad to help you out. Please provide me your trip dates.

USER: Ok, my travel dates are 10/24 and 10/26 respectively.

ASSISTANT: Here is a flight with 1 stop and price is 200, can I proceed with it.

USER: Ok, please book.

ASSISTANT: Your ticket has been booked with 1004 flight in Southwest airlines.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.