You are a flight assistant. 
 USER: Hello, Dorothy Clark here.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket from DEN to LAS. can you please help?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: May I know your planned journey dates?

USER: I will be travelling from 10/21 to 10/23.

ASSISTANT: Do you want any connection in between your flight journey?

USER: Yes, I need a halt.

ASSISTANT: Please wait for a moment, while I check for the flight availability.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your journey data.

USER: It's ok, thank you anyway.

ASSISTANT: Thank you visiting us, we hope see you again.