You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Betty Baker.

ASSISTANT: How can I help you today?

USER: Can you help me in booking the ticket from OAK to JFK?

ASSISTANT: Sure, I am very happy to help you with that.

USER: Thanks.

ASSISTANT: Can you please mention your travel dates?

USER: My planning dates are from 04/21 to 04/23.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Sure.

ASSISTANT: Sorry no flights available in this route as per your requested dates.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for reaching us, have a good day.