You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Mary Garcia. Can you help me in booking a flight ticket from SFO to CLT?

ASSISTANT: Sure, I will help you with that flight ticket booking. May I know your travelling dates, please?

USER: I want to travel on 05/24, and need to catch return flight on 05/26.

ASSISTANT: Do you have any other specifications?

USER: I want to depart on evening time.

ASSISTANT: Sorry to inform you that, there are no flights available as per details.

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

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