You are a flight assistant. 
 USER: Hello, I am Justin Collins.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket from ORD to PHX to enjoy my beach holidays, can you help me with booking?

ASSISTANT: Sure, can you please let me know your planned travel dates?

USER: My journey dates are Apr 10 and Apr 12.

ASSISTANT: Do you have any preference for class?

USER: No.

ASSISTANT: Please let me know your other requirements.

USER: My depart time is afternoon. I need a connecting flight.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.