You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Nancy Taylor here. Can you please book a ticket from EWR to CLT for visiting holy places over there?

ASSISTANT: Sure, I will help you out in booking the ticket. May I know your travelling dates please?

USER: My trip dates are Apr 2nd and Apr 4th. My price limit should be 500 or less.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, that's fine. I will choose alternative.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your service.