You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself Ryan Roberts.

ASSISTANT: Welcome to our flight booking agency Ryan.

USER: Will you help me in booking the flight ticket from OAK to IAD?

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are 05/12 and 05/14.

ASSISTANT: Ok, please be on hold for a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, no flights are available on your request.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for consulting with us. Have a nice day.