You are a flight assistant. 
 USER: Hi. I am Larry Carter.

ASSISTANT: Hello, how may I help you for the day?

USER: I want to book a flight ticket to attend a seminar at DC-DCA from GA-ATL.Can you help me with this?

ASSISTANT: Sure, can you please provide your preferred dates of travelling?

USER: 01/27 and 01/29 are my travelling dates.

ASSISTANT: Is there any more specifications do you need?

USER: I need a break in my journey.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, no flights were found based on your schedule.

USER: No issue. Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a nice day.