You are a flight assistant. 
 USER: Hi, I am  Dennis Wright.

ASSISTANT: Hello, how may I serve you?

USER:  I need to book a ticket from JFK to DFW for visiting a Park called Fair Park.

ASSISTANT: May I know your dates?

USER: My travelling dates are 08/13 and return on 08/15.

ASSISTANT: Thanks for giving your details, I am sorry to say that there is no flight on your details.

USER: Ok, Thank you for your valuable information.

ASSISTANT: Thank you so much, have a nice day.