You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to book a flight ticket to PHL from IAH, can you please help me out?

ASSISTANT: Sure, may I know your trip dates please?

USER: Sure, my planned travelling dates are Mar 02 and Mar 04.

ASSISTANT: Can I know your name?

USER: Sure, my name is Charles Anderson.

ASSISTANT: Do you have any other requirements?

USER: Yes, I prefer business class.

ASSISTANT: Ok, please wait for a while.

USER: I am looking for a flight with 1 connection.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: My airline must be in normal cost. It's ok, thank you for the information.

ASSISTANT: Most welcome.