You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am planning to book a flight ticket to DCA from OAK, can you please help me out?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned travelling dates are May 31 and June 02.

ASSISTANT: Do you have any requirements?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Let me know your name?

USER: Sure, my name is Amy Perez.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.