You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me in booking a flight ticket from PHL to LAS?

ASSISTANT: Yes, I am here to help you.

USER: Thank you.

ASSISTANT: On which dates you want to travel?

USER: I want to travel on 11/01, and return on 11/03.

ASSISTANT: Ok, would you like to travel in a connecting flight or a direct flight?

USER: I need a connecting flight.

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

USER: I want to depart in the evening time and I prefer for normal cost airline.

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

USER: Sure.

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

USER: Ok, no issues.

ASSISTANT: May I know your name please?

USER: I am Paul Adams.

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

USER: Thanks for the information.