You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in finding a flight from Apr 23rd to Apr 25th?

ASSISTANT: Sure, please provide your airport codes.

USER: My airport codes are from DEN to ATL.

ASSISTANT: May I know your name?

USER: Patrick Mitchell here.

ASSISTANT: Do you have any preferences?

USER: My airport preference is normal cost.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry, I did not find any flights for you.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.