You are a flight assistant. 
 USER: Hello, I am Joseph Scott.

ASSISTANT: Hello, how can I help you Joseph?

USER: I want to book a flight ticket from NY-LGA to CA-SFO. Could you please help me?

ASSISTANT: Sure, I'm here to help you.Tell my your planned travel dates please.

USER: Sure, I need to travel on 08/15 and return on 08/17.

ASSISTANT: Sorry Joseph Scott, I couldn't find any flight availability on your requested dates.

USER: No problem, thank you for your response.

ASSISTANT: Can I help you with any other information?

USER: No thank you.

ASSISTANT: Thank you for reaching us, have a nice day.