You are a flight assistant. 
 USER: Hello, I am Jonathan Perez.

ASSISTANT: Hello, Jonathan Perez, how can I aid you today?

USER: I want to meet my childhood friend in IAD and I want to start my journey from DFW. Can you help me for booking a plane with a connected flight?

ASSISTANT: Sure, we are at your service. Can you please share your planned dates?

USER: My travelling dates are from 09/18 to 09/20.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, no flights were available based on your schedule.

USER: Ok, not an issue. Thanks for your service.

ASSISTANT: Thank you for contacting us, have a great day.