You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit Las Vegas, can you please book me a ticket from PHX to LAS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I am planning my journey on the dates of Dec 03 and Dec 05.

ASSISTANT: Do you have any class specification on your journey/.

USER: I prefer economy class.

ASSISTANT: May I know your name for the documentation purpose?

USER: My name is Jeffrey Robinson.

ASSISTANT: Do you have any another specification on your journey?

USER: I prefer connecting flight for this trip.

ASSISTANT: Unfortunately, no flights available on your requirements.

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

ASSISTANT: Welcome, thank you for reaching us.