You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Raymond Allen here. I need to reserve a ticket from SEA to CLT, can you help me in doing that?

ASSISTANT: Sure, can you share your journey dates?

USER: My journey dates are Nov 25 to 27.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight in economy class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there is no flight on your given requirements.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.