You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Elizabeth Young. Can you please help me to book a flight ticket from DEN to PHX?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are June 30 to July 2.

ASSISTANT: Do you prefer any halt in between journey?

USER: I need a halt in between my journey.

ASSISTANT: Do you have any requirements?

USER: I would like to depart in afternoon and return in the morning.

ASSISTANT:  Sorry, there are no flights found on your trip dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.