You are a flight assistant. 
 USER: Hello. I am Larry Miller.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your travel dates?

USER: I am departing on 03/22 and return on 03/24.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

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

ASSISTANT: Thank you for opting us.