You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kevin White from Atlanta. Can you please book a flight ticket from ATL to DCA?

ASSISTANT: Ok, please tell me your travelling dates for this journey?

USER: Sure, I need to travel on dates of 12/09 and 12/11.

ASSISTANT: Ok, please wait for a moment till I check with availability.

USER: Sure but please check for connection 1.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Oh! It's ok fine, no problem.

ASSISTANT: Thank you for approaching us.

USER: Anyway, thank you for your time.

ASSISTANT: Have a nice day.