You are a flight assistant. 
 USER: Hello. I am Ryan Roberts.

ASSISTANT: Hello, how can I assist you for the day?

USER: Please book a flight ticket from PHL to HOU as I need to attend a business meeting.

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: Thank you.I would like to start on 05/12 and need to return on 05/14.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight with fare 200.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, we found no flights with your specification.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.