You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book the flight ticket from IAD to BOS. Can you please help me?

ASSISTANT: Sure, could you please help me with your planned travel dates?

USER: Dates are Mar 30 and Apr 01.

ASSISTANT: May I know your name please?

USER: Gregory Mitchell here.

ASSISTANT: Do you need a connecting flight?

USER: Connected flight required.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Gregory Mitchell, no flights has been found on your planned travel dates.

USER: No issues. Thanks for checking.

ASSISTANT: Thank you for approaching us.