You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you?

USER: I am Gary Martinez. Please help me in booking flight ticket from Denver, CO-DEN to Seattle, WA-SEA.

ASSISTANT: Sure, may I know your travelling dates?

USER: Yes, my travelling dates are 02/26 and 02/28.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We have a connecting flight from Spirit airline, number 1028 and the fare is 600. Shall I proceed?

USER: I can't afford that much, please don't proceed further.

ASSISTANT: Ok, thank you for checking with us.

USER: Ok, thank you for the information.