You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for today?

USER: I am Helen White. I need to fly from OAK, will you please help me in making an airline reservation to DCA?

ASSISTANT: Sure, I will help you with that Helen White. Can you please provide your planned dates of journey?

USER: My planned dates are Jan 15th and Jan 17th.

ASSISTANT: Please wait for sometime to check the available flight for your journey.

USER: Sure.

ASSISTANT: We regret to say this Helen White, there are no flights which travels to your region.

USER: Ok, no issues. Thank you.

ASSISTANT: You are welcome, thank you for reaching us. Hope you have a nice day ahead.