You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Christopher Adams. I would like to give some gifts to my friends at Charlotte for this Christmas. Can you help me in booking a ticket from OAK to CLT?

ASSISTANT: May I know your travelling dates please?

USER: My planned trip dates are 12/22 and 12/24.

ASSISTANT: I am sorry no flights found on your routes.

USER: Its ok, no issues. I will find other way out. Thank you for the information.

ASSISTANT: Thank you for choosing us.