You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I need to book a flight ticket from CLT to DEN, can you help me in booking a flight ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure, my travelling dates are Dec 17 and Dec 19.

ASSISTANT: May I know your connection limit?

USER: I prefer maximum one connection.

ASSISTANT: Do you have any other specification that you are looking for?

USER: I would prefer return time at morning.

ASSISTANT: May I know your name to proceed further?

USER: Sure, Angela Moore here.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

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

ASSISTANT: Thank you for contacting us.