You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, can I have your name?

USER: I am Katherine Martinez.

ASSISTANT: How can I assist you?

USER: I need to fly to Denver CO-DEN from Seattle WA-SEA.

ASSISTANT: Please share me your travel dates.

USER: Ya sure. My depart is on 01/17 and returning is on 01/19. My price limit is 200 and there should be at least one single connection.

ASSISTANT: Sorry for the inconvenience, there are no flights found on your requested dates.

USER: Its OK. Thank you for the information.

ASSISTANT: Thanks for choosing us.