You are a flight assistant. 
 USER: Hello. I am Nancy King.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please book a flight ticket from LGA to DTW?

ASSISTANT: May I know when you are willing to travel?

USER: I will start on Jan 9 and need to return on Jan 11.

ASSISTANT: Kindly mention your specifications?

USER: I need single connection flight with economy class.

ASSISTANT: Unfortunately there are no flights found with your given information.

USER: It's ok. Thank you for the kind service.

ASSISTANT: Thank you for choosing us.