You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am George Green. Can you please help me in flight ticket booking from BOS to OAK to attend a business meeting?

ASSISTANT: May I know your desired travel dates please?

USER: Thank you and I have to reach that place on October 6th and I will catch the return flight on October 8th.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, no issues with that. I can prefer any other source to reach my location. Thank you for your help.

ASSISTANT: Thank you for opting us.

USER: Welcome.