You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book me a plane ticket from EWR to DTW?

ASSISTANT: Sure, please share your journey dates?

USER: I am planning to start on Sept 27 and return on Sept 29.

ASSISTANT: Do you have any specifications?

USER: I need 1 lay by.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Betty Thomas.

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

USER: No problem, thank you for searching.

ASSISTANT: Thank you for choosing us.