You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Please book a ticket from IAD to MSP.

ASSISTANT: Sure, can I know your preferable dates?

USER: Departure date is Feb, 23 and return is by Feb, 25.

ASSISTANT: I found an economy class ticket in Spirit airlines with normal cost of 200 and it is a direct flight. Can I book your ticket?

USER: Please do not book ticket.

ASSISTANT: Ok.

USER: Thanks.

ASSISTANT: Can I know your name?

USER: My name is Sharon Garcia.

ASSISTANT: Thank you.