You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Joseph Collins here. I want to travel a round trip, can you help me to book a flight ticket from SEA?

ASSISTANT: Yes, I can help you. Can you tell me your dates of travel?

USER: My planning dates are 08/10 and 08/12.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: It's ok, not an issue.

ASSISTANT: Thank you for contacting our agency.