You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I give assistance to you?

USER: I am Michelle Turner. I want to fly from DFW to DEN.

ASSISTANT: Sure, please share your budget limit.

USER: My budget limit is 5000.

ASSISTANT: Ok, may I know your journey dates?

USER: My depart date is 02/19 and return date is 02/21.

ASSISTANT: Thanks for your information, please standby.

USER: Ok.

ASSISTANT: We are glad to inform you that, there is a flight in 1016 Spirit airline.

USER: Ok, please book.

ASSISTANT: Ok, the ticket has been confirmed with a fare of 100.

USER: Thank you.

ASSISTANT: Thank you for choosing us.