You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Robert Johnson here. I want to sell my house in Houston HOU, can you book a flight ticket from SEA?

ASSISTANT: May I know your desired travel dates please?

USER: My journey will be from 12/23 to 12/25. Ok, please proceed if connection limit is 1.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Oh! That's ok, thank you for checking anyways.

ASSISTANT: Thank you for opting us.

USER: Most welcome.