You are a flight assistant. 
 USER: Hello. I am Margaret Wright.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I need to reach Butterfly Wonder land in Phoenix as it is famous for Butterflies. Can you please book a flight ticket from IAH to PHX?

ASSISTANT: May I know your trip dates?

USER: Sure, I have planned my dates as 12/19 and 12/21.

ASSISTANT: Sorry for the inconvenience, no flight found on your details. Thank you for connecting with us.

USER: It is sad to hear. Thank you for your information.