You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Karen Perez here.

ASSISTANT: How may I help you?

USER: I want to travel from ATL to DEN for attending a meeting. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: My departure date is 08/28 and return date is 08/30.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait. Make sure my connections limit is 1.

ASSISTANT: Sorry, there are no flights.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for reaching our services.