You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Benjamin Turner.

ASSISTANT: How can I help you?

USER: I am planning to attend music concert at SFO, can you please help me with booking a flight ticket from LGA?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, I would like to take off on July 3 and return on July 5.

ASSISTANT: Do you have any other specifications?

USER: I would like to return during afternoon time.

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

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for opting us.