You are a flight assistant. 
 USER: Hello. I am Samuel Carter.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you help me to find a flight from EWR to OAK?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates for booking flight ticket?

USER: My travelling dates are 07/23 and 07/25.

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

USER: Sure, take your own time.

ASSISTANT: Based on your information, Frontier airline is ready to serve you with 1 connection with a minimum fare of 300 is available for you. Shall I proceed with this?

USER: I need flight with fare 200.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry no flights are available in this route as per your requested budget limit.

USER: That's fine, thanks for your information.

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