You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Jason Gonzalez. Could you help me with booking ticket from DCA to ATL, to meet my brother.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Ok, my journey dates are from Dec 23 to 25.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Yes, I want to departure in the morning time.

ASSISTANT: Do you have any requirements?

USER: Yes, I am looking for a flight with single connection.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.