You are a flight assistant. 
 USER: Hello. My name is Brenda Roberts.

ASSISTANT: Hello, how may  I serve you  at this moment?

USER: I want to book a flight ticket from JFK to PHX. Can you please aid me for booking?

ASSISTANT: Sure, can you please let me know your depart and arrival dates?

USER: My depart and arrival dates are Nov 18 and Nov 20.

ASSISTANT: Do you prefer any class in your journey?

USER: I am comfortable with any class.

ASSISTANT: Please let me know your connection limit?

USER: I need a connected flight.

ASSISTANT: Is there any more specifications?

USER: My depart time is evening and arrival time is morning.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your preferences.

USER: Ok, thank you.