You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Myself Michelle Evans. I want to travel from JFK to ORD for my business trip. Can you please book my ticket?

ASSISTANT: May I know your travelling dates, please?

USER: My travelling dates are from 11/01 to 11/03.

ASSISTANT: Do you need any specifications?

USER: I want to take off in the evening.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching our service.