You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I aid you for the day?

USER: Can you book a direct flight from HOU to PHL to attend my sister's marriage?

ASSISTANT: Sure, please share your travelling dates?

USER: My planned travel dates are June, 26 and June, 28.

ASSISTANT: Do you need a connecting flight?

USER: I already mentioned above.

ASSISTANT: In which class do you want to fly?

USER: I prefer to economy class.

ASSISTANT: Do you have any preference with the timings?

USER: Yes, I need to depart at afternoon time.

ASSISTANT: Can I know your good name?

USER: George Williams here.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you.