You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I render you today?

USER: I am Katherine Young, can you help me to book a flight from OAK to DCA?

ASSISTANT: Sure, I can help you with that. May I know your preferable travel dates please?

USER: My travelling dates are 03/07 and 03/09.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: As per your details, there are no flights available for you on those dates.

USER: No issues. Thank you for your time.

ASSISTANT: Thank you for reaching us.