You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: Can you please help me with booking a flight ticket from PHL to IAH?

ASSISTANT: Sure, let me know your travel dates?

USER: My travel dates are July 23 and 25.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight.

ASSISTANT: Any other preference?

USER: That's all, thanks for asking.

ASSISTANT: Can you share your name to proceed further?

USER: My name is Thomas Taylor.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: That's ok. Thank you.

ASSISTANT: Thank you for contacting us.