You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Good Evening. How can I help you?

USER: I am Richard Jones. I would like to travel from MA-BOS to PA-PHL. Will you please help me to get a flight ticket?

ASSISTANT: Sure Jones, let me know your travel dates?

USER: My travel dates are 12/17 and 12/19.

ASSISTANT: Give me a minute, let me check the details.

USER: Sure.

ASSISTANT: Sorry, there is no flight matching with your requirements.

USER: OK, that's fine. Thank you for your help.

ASSISTANT: Thank you.