You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please help me in booking flight ticket from IAH to PHL to meet my family.

ASSISTANT: Your travelling dates please?

USER: My trip dates are May 04 to May 06.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Edward Evans.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.