You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you at this moment?

USER: Myself Nicole Campbell, I would like to travel Oakland for attending a business meeting. Can you please help me in booking the ticket from DCA to OAK?

ASSISTANT: Sure, I am glad to help you. Please share your travelling dates.

USER: I will drop-off 02/01 and again I will be return back on 02/03.

ASSISTANT: Please wait for a moment. I will check the availability.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no flight available on your dates of journey.

USER: Not a big problem, anyhow thank you very much for your service.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.