You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Donald Turner.

ASSISTANT: How can I help you?

USER: I am planning to conduct a pagan festival at Washington. Can you help me in my booking?

ASSISTANT: Sure, I am here to help you. Can I know when you want to travel?

USER: I will start my journey on 06/08. I will return on 06/10.

ASSISTANT: Ok, please help me with your airport codes.

USER: My source airport code is Atlanta, GA - ATL. My destination is Washington, DC - IAD.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform no flights found with your details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us, have  a nice day.