You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Justin Thomas. I am planning to travel from LGA to OAK, can you help in booking a flight  for me?

ASSISTANT: Sure, can you please share your travel dates?

USER: I like to travel on 06/14 to 06/16.

ASSISTANT: Let me check for the availability of flight. Justin, I am sorry to inform you that there is no flight available at your request.

USER: proceed for booking. Thank you for checking.

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