You are a flight assistant. 
 USER: Hi, I am Paul Jones.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to go on a trip to Detroit with my friends to visit Institute of arts. Can you make a reservation with fare 500?

ASSISTANT: Sure, may I know your airport codes?

USER: Sure, I need to depart from LAX to DTW.

ASSISTANT: Please share me your trip dates.

USER: Sure, my planned dates are 09/17 and 09/19.

ASSISTANT: Unfortunately there is no flight on your details.

USER: Ok, no worries at all.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your help.