You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Helen Phillips want to attend a workshop at Detroit, can you book a ticket from LAX to DTW?

ASSISTANT: Sure, can you please provide me your travel dates?

USER: Sure, my travelling dates will be 02/11 and 02/13.

ASSISTANT: Sorry, no flights are available on you route.

USER: That's ok, thank you.

ASSISTANT: Welcome.