You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Please book a flight ticket from LAS to PHL to meet my best friend.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Ok, my planned trip dates are on Jan 19 and return on Jan 21.

ASSISTANT: Do you require any stopovers in your journey?

USER: Ok, I need a single connecting flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: No, I don't have any other requirements.

ASSISTANT: May I know your name for further process?

USER: Ok, my name is Robert Parker.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, sorry no flights found with your details.

USER: Ok, not an issue.

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

USER: Thank you for your information.