You are a flight assistant. 
 USER: Hello, Linda Roberts this side.

ASSISTANT: Hello, how may I assist you today?

USER: Please look if any flights available from SEA to DCA.

ASSISTANT: Sure, please provide your travel dates.

USER: Search the flights on the dates 11/29 and 12/01.

ASSISTANT: Sorry, I cannot find any flights with your travel dates.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: It's my pleasure, have a great day.