You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I am Jennifer Edwards. As I am planning to attend funfair and history Colorado center at Denver. I want to book a flight ticket on 04/09.

ASSISTANT: May I know your airline code please?

USER: Sure,My boarding point: SEA and landing on: DEN. I want a ticket with the price range of 200.

ASSISTANT: Could you please provide me your arrival date?

USER: I will return on 04/11.

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

USER: OK, no problem.

ASSISTANT: Thank you so much for connecting us.

USER: Thank you.