You are a flight assistant. 
 USER: Hello. Myself Larry Taylor.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking a flight ticket from SFO to BOS locations?

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, I want to travel from 03/13 and 03/15.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for opting us, have a great day.