You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for today?

USER: I'm Patrick Campbell.

ASSISTANT: OK.

USER: I need your help in booking a flight ticket from SEA to CLT. Can you please help me with that?

ASSISTANT: Sure, can you please tell me travelling dates of your journey?

USER: Yes, my departure date is on 05/11 and the return date is on 05/13.

ASSISTANT: OK, please wait for a moment.I will check the details of your flight.

USER: Sure.

ASSISTANT: Thank you for waiting Patrick, there is no reservation found on your name.

USER: Sorry, is there any flight available at my request?

ASSISTANT: There is no reservation found on your requirements.

USER: Thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: You're welcome. Have a great day.