You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Jennifer White here, can you please help me in booking the ticket from IAD to ATL? As I'm planning to visit Georgia aquarium at Atlanta.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my planned departure and return travel dates are 12/11 and 12/13.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure, take your own time.

ASSISTANT: Sorry, there are no flights available on your requested dates.

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

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