You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sharon Green here.

ASSISTANT: How may I assist you today?

USER: As there is a sport event going on in Phoenix so, I am willing to travel there. Can you please assist me to book a flight ticket from Charlotte, NC - CLT?

ASSISTANT: Sure, I will help you.

USER: Thank you for accepting my request.

ASSISTANT: Welcome. Could you please provide your preferable dates that you want to travel?

USER: Sure, my preferable dates to travel are 08/09 and 08/11.

ASSISTANT: Ok, may I know your destination airport code for proceeding further?

USER: Yes, my destination airport code is AZ - PHX.

ASSISTANT: Please hold on a moment to check the flights availability.

USER: Ok, please make sure that price limit should not exceed 5000.

ASSISTANT: Sorry to inform you that, all the ticket are sold out. There are no flights available for your requested dates of travelling.

USER: That's ok fine I will contact other services to book my flight ticket.

ASSISTANT: Ok, please go with it.

USER: Ok, thank you for your services.

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