You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Amy Walker, I need to book a flight ticket to ATL from IAD. Can you please help me out?

ASSISTANT: Sure, can I know the travel dates please?

USER: Thank you for your positive response. My travel dates are 01/27 and 01/29.

ASSISTANT: Sorry to say this Amy, there are no flights on your planned dates of your journey.

USER: Not a problem, anyway thank you for the help.

ASSISTANT: Thank you for approaching us.