You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Anthony Smith, I need to reach Boston university as I got promotion as lecturer. Can you please book a flight ticket?

ASSISTANT: Congratulations Smith. Sure, can I know the travel details please?

USER: Sure, my travel dates are 02/12 and 02/14 and airport codes are BOS and BOS itself.

ASSISTANT: Ok, hold on for a moment please.

USER: Sure, please take a time.

ASSISTANT: Sorry to say this Smith, we could not find a flight with your requested dates.

USER: Oh! That's sad to hear. Anyway, thank you for your help.

ASSISTANT: Thank you for reaching us.