You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Cynthia Garcia.

ASSISTANT: Cynthia Garcia, what can I do for you now?

USER: I want to visit white House at Washington, DCA. Can you please book a ticket from OAK?

ASSISTANT: Ok. Let me know your travelling dates.

USER: My depart is on 08/23 and return is on 08/25.

ASSISTANT: Thanks for your time. Unfortunately, there were no flights with your information.

USER: No problem. Thank you.

ASSISTANT: Thank you for consulting us.