You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please book me a flight ticket from PHL to HOU to meet my family.

ASSISTANT: Sure, let me know your travelling dates?

USER: I have planned to travel on Aug 16th and return on Aug 18th.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Is there any other preferences?

USER: No, thanks.

ASSISTANT: May I know your name?

USER: Ashley Young.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.