You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I support you today?

USER: Please book a ticket from Seattle, WA-SEA to Houston, TX-HOU.

ASSISTANT: Sure, may I know your price limit please?

USER: Price limit is 5000.

ASSISTANT: Could you please assign your travelling dates?

USER: My travelling dates are from 06/05 to 06/07.

ASSISTANT: May I have your name please?

USER: I am Nicole Moore.

ASSISTANT: Sorry to say that, no flights were available on your requested dates.

USER: Thank you.

ASSISTANT: Thank you for opting us.