You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can serve you for the day?

USER: I would like to visit Seattle for my office work, can you please help me to book my flight ticket from EWR to SEA?

ASSISTANT: Sure, can you please share your journey dates that you wish to travel?

USER: Sure, I will depart on July 23th and I would like to return back on July 25th.

ASSISTANT: Can you please let me know your connection limit?

USER: Yes, please check for the flight with single connection.

ASSISTANT: In which airlines do you prefer to travel in your journey?

USER: I prefer for a normal-cost airlines.

ASSISTANT: Is there any class preference?

USER: No class preference.

ASSISTANT: Is there any more preferences do you need?

USER: No.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we did not find any flights matching your preferences.

USER: Sad to hear that, thank you for checking.

ASSISTANT: For documentation purpose may I know your name please?

USER: My name is Paul Nelson.

ASSISTANT: Thank you for choosing our services. Have a good day.