You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Justin Hall, I need to book a flight ticket to Phoenix for meeting my friend. Can you please help me to book a flight ticket to PHX from CLT?

ASSISTANT: Sure, I will help you in booking the ticket.

USER: Thank you for your assistance.

ASSISTANT: May I know your travelling dates please?

USER: Yes, my travelling dates are 04/07 and 04/9.

ASSISTANT: Ok, please wait for a while.

USER: Ok. Please confirm my return date as 04/09.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.