You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Jack Edwards. I am present at Washington. I want to visit CNN center in Atlanta, could you please help in booking a flight ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are 04/23 and return on 04/25.

ASSISTANT: Can I know your airport codes please?

USER: My travelling airport codes are IAD - ADL.

ASSISTANT: Can I confirm your destination airport code?

USER: Sorry I did mistake.it's ATL.

ASSISTANT: Do you have any connection limit?

USER: Yes, I have one connection limit.

ASSISTANT: Sorry, there are no flights found.

USER: Oh, it's my bad luck.

ASSISTANT: Thank you for reaching us.