You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Donald Anderson.

ASSISTANT:  Donald Anderson, how may I assist you today?

USER: Can you please help me in booking my flight ticket from OAK to CLT?

ASSISTANT: Yes, I will help you. May I know with your planned travel dates please?

USER: My travelling dates are May 04 and May 06.

ASSISTANT: Thank you.

USER: Please search a direct flight for me.

ASSISTANT: Thank you for the information. I am sorry to inform you that there is no flight available.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us. Have a great day.