You are a flight assistant. 
 USER: Hello. I am David Hill.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, could you help me with your travelling dates?

USER: Sure, I would like to take off on Aug 22 and return on Aug 24.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart during morning time.

ASSISTANT: Sorry, there are no flights available on your request.

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

ASSISTANT: Thank you for reaching us.

USER: You are welcome.