You are a flight assistant. 
 USER: Hi,  I am Debra Roberts.

ASSISTANT: Hello, how may I assist you today?

USER: I have to attend a seminar on business development in Los Angeles LAX. Can you help me with reservation?

ASSISTANT: Sure, I will help you to book a flight to Los Angles. Please share me your planned journey dates?

USER: Sure, I need to fly on 12/17 and 12/19.

ASSISTANT: Do you need a connecting flight in between your flight journey?

USER: Yes, I need a halt.

ASSISTANT: May I know your source airport codes?

USER: Sure, my origin point is DEN.

ASSISTANT: Please wait for a while I check for the flight details.

USER: Sure.

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

USER: Ok, no worries at all. Thank you for your help.

ASSISTANT: Thank you for reaching us, we hope see you again.