You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Linda Lewis here.

ASSISTANT: How can I assist you Linda Lewis?

USER: Can you book a flight ticket to Detroit on my travel dates 06/13 to 06/15?

ASSISTANT: Sure, can you please provide your nearest airport codes of travelling?

USER: My airport codes will be LAX to DTW. As Detroit will be my destination.

ASSISTANT: Linda Lewis, there are no flights available on this route on your requested dates.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for contacting us.