You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to book a flight from PHL to HOU?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Sure, I want to travel on Mar 16 and need to return on Mar 18.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I am looking for a flight with single connection.

ASSISTANT: May I know your good name please?

USER: Myself Kevin Carter.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.