You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to travel from ATL to DEN, can you please help me in flight booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will start on Dec 17, return on Dec 19.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a single connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: I want economy class flight ticket.

ASSISTANT: May I know your name for the booking ?

USER: My name is Richard Jones.

ASSISTANT: Sorry, no flights are available on your required dates.

USER: Not an issue, thank you.

ASSISTANT: Welcome, thank you for reaching us.