You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am looking for a flight from PHL to HOU, can you help me?

ASSISTANT: Sure, I'm glad to help you with that. May I know on which dates are you planning to depart and arrive?

USER: I want to fly on 22 Feb and return on 24 Feb.

ASSISTANT: Do you prefer stopover in between your journey?

USER: I want a connecting flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I prefer to return in the afternoon.

ASSISTANT: May I know your good name please?

USER: I am Paul Mitchell.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Oh! very sad to hear, thank you.

ASSISTANT: Thank you for choosing us.