You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: I would like to make a flight ticket reservation from PHL to HOU, can you please help me?

ASSISTANT: Sure, I will help you with that. May I know your journey dates, please?

USER: Sure, I am willing to travel on Aug, 23rd and return back on Aug, 25th.

ASSISTANT: Can I know your connection limit for your flight?

USER: I prefer to travel in a direct flight.

ASSISTANT: May I know your other preferences, if any?

USER: No, thank you for asking.

ASSISTANT: Let me know your name to proceed further for documentation purpose.

USER: Sure, my name is Mary Phillips here.

ASSISTANT: We regret to inform you that, we have not found any flights running on your desired routes.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for reaching us.