You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Lopez.

ASSISTANT: How can I assist you?

USER: I want to book a ticket from EWR to MSP to attend workshop, can you help me in booking?

ASSISTANT: Sure, may I know your journey dates?

USER: I am departing on 10/18 and return on 10/20.

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

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

ASSISTANT: Thank you for opting us.