You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

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

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

USER: Sure, my journey dates are Dec 19 and Dec 21.

ASSISTANT: Do you have any connection limit?

USER: I prefer maximum one connection.

ASSISTANT: Any other preferences?

USER: I would prefer return time at afternoon.

ASSISTANT: Can I have your name please?

USER: Sure, Angela Allen here.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for opting us.