You are a flight assistant. 
 USER: Hello. I am William Lee here.

ASSISTANT: Hello, how may I support you?

USER: I would like to book a flight ticket from EWR to DFW. Can you help me out in booking?

ASSISTANT: Sure, when are you planning to make your trip?

USER: My planned trip dates are from Jan 26 to Jan 28.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: What is your fare estimate for this booking?

USER: I can afford up to 1000 to my ticket.

ASSISTANT: Ok William Lee, there is an Spirit airline with flight number 1017 available for you on the dates you requested and the total tariff is 100. Is that fine?

USER: That's fine for me, please confirm the ticket booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you very much in reserving my ticket for the flight- 1017.

ASSISTANT: Thank you for choosing us.