You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking the ticket from ATL tom DCA? As I'm planning to visit Washington.

ASSISTANT: Sure, I can do that for you. Could you please provide me your travel dates?

USER: Sure, my planned travel dates are 07/18 and 07/30.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: May I know your name? Sorry, there is no flight available on your preferred travel dates.

USER: It's ok, thank you for giving the information. My name is Emily Thompson.

ASSISTANT: You are welcome and thank you for contacting us.