You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like travel from OAK to DCA, to attend the birthday party.

ASSISTANT: Sure, may I know your travelling dates?

USER: Can you make a reservation for me?

ASSISTANT: Ok, can I have your name?

USER: My probable travelling dates are from 09/02 till 09/04. Myself Ryan Anderson. Ensure that connection limit should be 0.

ASSISTANT: Sorry Ryan, no flight's found on your details.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for contacting  us.