You are a flight assistant. 
 USER: Hi,. I am Charles Young.

ASSISTANT: Hello, Charles Young. How can I assist you today?

USER: I would like to attend my friend birthday at DC - DCA. My source is MA - BOS.

ASSISTANT: Can you please provide me your dates of journey?

USER: I will return on 08/08 and starts on 08/06.

ASSISTANT: Ok, please wait a moment I will check the availability and revert to you.

USER: Sure.

ASSISTANT: Sorry no flight found on your given details.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: Thanks for your response.