You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket from SEA to DCA, can you help me?

ASSISTANT: Can you please tell your travelling dates?

USER: My travel dates are 05/11 and 05/13.

ASSISTANT: May I know your name please?

USER: Myself Raymond Turner.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you and have a nice day.