You are a flight assistant. 
 USER: Hello, I am Alexander Martinez.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to meet my friend at Denver, CO-DEN. So I need to book a flight ticket from Seattle, WA-SEA?

ASSISTANT: May I know your travel dates please?

USER: My journey dates are from 03/09 to 03/11.

ASSISTANT: Do you have any specifications?

USER: I need direct flight. My price limit is 1000.

ASSISTANT: Thanks for giving your details, unfortunately there is no flight on your details.

USER: That's not a problem.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your service.