You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Houston, will you help me in booking the flight ticket from PHL to HOU?

ASSISTANT: Yes, I am here to help you. Kindly mention your planned travelling dates to proceed further.

USER: My travelling dates are Sept 12 and Sept 14.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a flight with single connection.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: No, thank you for asking.

ASSISTANT: Can I have your name please?

USER: Myself Thomas Miller.

ASSISTANT: Thank you for providing your journey details, please wait a moment I'll search best flight for you.

USER: Ok, I will wait.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: Ok, not an issues.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your information.