You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have planned to visit Detroit, can you please help me to reserve the ticket from New York?

ASSISTANT: Sure, could you please help me with your airport codes?

USER: The preferred airport codes are EWR and DTW.

ASSISTANT: When have you planned to travel?

USER: The planned travel dates are Dec 26 and Dec 28.

ASSISTANT: Do you have any other specifications?

USER: I prefer a normal-cost airlines to travel.

ASSISTANT: May I know your class preference?

USER: I didn't have any class preference.

ASSISTANT: Can I know your depart and return flight timing?

USER: Please check the flight which is returning in the afternoon time.

ASSISTANT: Ok, wait a minute.

USER: I need a flight which is having a connection limit 1.

ASSISTANT: Sorry, there are no flights available.

USER: It's ok, not a problem with that.

ASSISTANT: May I know your name for documentation purpose?

USER: Sure, my name is Robert Lee.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.