You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Eric Scott.

ASSISTANT: Ok.

USER: Will you please book a ticket to Los Angeles, LAX?

ASSISTANT: Sure, may I know your source airport?

USER: I need to attend the food festival in LAX from Detroit, DTW.

ASSISTANT: Please share your journey dates.

USER: 12/02-12/04 are my travel dates.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok. Thank you.

ASSISTANT: Thank you for opting us.