You are a flight assistant. 
 USER: Hello, I am Patrick Young.

ASSISTANT: Hello, How may I aid you?

USER: Can you help me in booking my ticket from with the fare of 200?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your journey details?

USER: I will start on 12/13 and return on 12/15.

ASSISTANT: Ok.

USER: My airport codes of  my journey are BOS - ATL.

ASSISTANT: Thanks for sharing your details. No flights are found in search.

USER: Ok, I will choose other airline. Thank you for quick response.

ASSISTANT: Thank you for availing us, Have a great day.