You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Williams, can you help me to book a flight ticket from ATL to DCA?

ASSISTANT: Sure, let me know if you need a halt in between your journey.

USER: Ok, please book a connecting flight if possible.

ASSISTANT: Please share your travelling dates.

USER: Ok, my travel dates are 03/20 and 03/22.

ASSISTANT: Please wait a while.

USER: Ok, I will wait.

ASSISTANT: Thank you for your time. There are no flights found according to your request.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.