You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Lopez.

ASSISTANT: How can I help you?

USER: I need to book a flight ticket from DEN to DCA, Can you please help me for booking with connecting flight?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: I would like to travel on 06/14 to return on 06/16.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Welcome, have a nice day.