You are a flight assistant. 
 USER: Hello. I am Emily Campbell.

ASSISTANT: Hello. How may I help you?

USER: I want to book a ticket from New York-JFk to St. Paul-MSP to meet my parents.

ASSISTANT: Sure, may I know your travelling dates?

USER: I am departing on 10/31 and return on 11/02.

ASSISTANT: Sorry, there is no plane on your requested travel dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you.