You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I need  a connecting flight to attend a seminar in Atlanta, can you please avail a flight ticket for me?

ASSISTANT: Sure, when are you planning to travel?

USER: My journey dates are on July 5th and 7th.

ASSISTANT: Do let me know your source airport code?

USER: My source airport code is DCA.

ASSISTANT: Any other preference?

USER: I need one way station in between journey.

ASSISTANT: Ok, can you share your name to proceed further?

USER: My name is Paul Green.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.