You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I help you?

USER: Please book a flight from Boston, MA-BOS to Atlanta, GA-ATL, for flower festival.

ASSISTANT: Ok, may I know your travel dates?

USER: My departure is on 09/20 and intend to return by 09/22.

ASSISTANT: Do you have any preferences?

USER: Ticket price limit is 200. Connections limit is 1.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT:  Sorry, no flights are found on your requested dates.

USER: Thanks for the help.

ASSISTANT: May I know your name?

USER: My name is Jessica Garcia.

ASSISTANT: Thank you for availing us.