You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today from my end?

USER: I have to participate in the basketball tournament, which is going to conduct in Los Angeles, can you please book a flight ticket from Houston?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My departure and arrival dates are Nov 19th and Nov 21st.

ASSISTANT: May I know your destination airport code?

USER: My destination airport code is LAX.

ASSISTANT: May I know your name to proceed further?

USER: Nicole Williams.

ASSISTANT: Sorry Nicole Williams, there is no flight in your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.