You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. What can I do for you now?

USER: Please book a flight to Oakland, CA-OAK from Washington, DC-IAD, for sports event.

ASSISTANT: Sure, for this we want to know your journey dates.

USER: I will return on 06/12 and depart by 06/10.

ASSISTANT: May I know your name for booking a ticket?

USER: I am Kimberly Edwards.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: We found that there was no flight that matches with your requirements.

USER: Thanks.

ASSISTANT: Thank you for your time with us.