You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am Jerry Green. Can you please help me in booking my flight ticket from SEA to DEN?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travelling dates are Oct 30 and Nov 01,. I need my flight ticket at evening time.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, fine thank you for checking.

ASSISTANT: You are welcome, have a great day.