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

ASSISTANT: Hello. How can I assist you?

USER: I would like to book a ticket from PHL to DCA, can you please help me out?

ASSISTANT: Sure, can I know the travel dates please?

USER: I am travelling on these dates 06/01 and 06/03.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for approaching us.