You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to travel in a business class flight, can you please help me out with booking of a flight ticket?

ASSISTANT: Can I know your travelling dates?

USER: Thank you for taking my request, my boarding is on Mar 09 and please book my return ticket on Mar 11.

ASSISTANT: Is there any connection limit?

USER: Yes, I will prefer single connection.

ASSISTANT: Let me know your travelling codes.

USER: Sure, I want to travel from SEA to ATL.

ASSISTANT: Can I know your name?

USER: Sure, my name is Christine Lopez.

ASSISTANT: Sorry, no flights found for your travelling dates. Thank you.