You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a ticket from JFK to IAH, can you hep me?

ASSISTANT: May I know your travel dates?

USER: My travel dates are 11/09 and 11/21.

ASSISTANT: May I know your name for further proceedings?

USER: My name is Sarah Edwards.

ASSISTANT: Sorry Edwards, there is no flight with your requirements? Thank you for choosing us.

USER: Ok. Thank you.