You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Amy Martinez here.

ASSISTANT: How can I help you today?

USER: Can you please help me in booking a flight ticket from IAD to OAK?

ASSISTANT: Sure, I am here to help you with that. Could you please mention your planned travel dates?

USER: Sure, my trip dates are from 01/31 to 02/02.

ASSISTANT: There is a flight with connecting available in Delta airline with a a fare of 100. Shall I proceed with this ticket booking?

USER: Can you please check for a direct flight?

ASSISTANT: Please wait for a while, let me check the connection limit.

USER: Sure.

ASSISTANT: Sorry to say that, there is no direct flight available on your route as per your journey dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for approaching us, have a great day.