You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I abet you?

USER: Can you help me in booking a flight ticket from CLT to JFK?

ASSISTANT: Sure, I will help you. Please can you tell me your travel dates?

USER: I want to travel on 04/26, and return on 04/28.

ASSISTANT: Do you have any specifications?

USER: I prefer for economy class.

ASSISTANT: Ok, may I know your name?

USER: I am Timothy Martinez.

ASSISTANT: Ok, please wait a minute. I will get back to you.

USER: Sure.

ASSISTANT: Sorry Timothy, we regret to inform you that there are no flights available on these route..

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Most welcome.