You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I want book a flight ticket from ATL to IAD. Can you help me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Ok, my respective travelling dates are 10/22 and 10/24.

ASSISTANT: Can I know your name please?

USER: Myself Pamela Davis.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Can you please check once, because I want to want attend a business meeting. Thank you for searching.

ASSISTANT: Sorry for inconvenience, there are no flights in your specifications.

USER: Thank you.

ASSISTANT: Thank you for reaching us.