You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: I would like to book a flight from ATL to SEA, can you please help me to book a flight ticket?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your departure and return dates of travelling?

USER: My travelling dates are Dec 30 and Jan 01.

ASSISTANT: May I know your name to book the flight ticket?

USER: My name is Christopher Turner.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection flight.

ASSISTANT: Do you have any specific departure and arrival times for your trip?

USER: No.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure, take your own time.

ASSISTANT: We regret to inform you that, there are no flights moving towards your region with your requested dates of travelling.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us, hope you have a great day.