You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you avail me to book a flight from IAH to LGA?

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

USER: My travel dates are Feb 28 and Mar 01.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I want to depart in the evening time.

ASSISTANT: May I know your name please?

USER: Stephen Parker here.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us.