You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joseph Hall.

ASSISTANT: Joseph, how may I help you?

USER: To participate in soft adventure sport at Oakland, CA - OAK. can you help me to book a direct flight?

ASSISTANT: Sure, please provide your trip dates.

USER: I want to fly on 12/01 and recur on 12/03.

ASSISTANT: May I know from which place you want to travel?

USER: My source is from Washington, DC - DCA.

ASSISTANT: Please give me a moment to check for available flights.

USER: Ok.

ASSISTANT: Sorry, no flight is available on your route.

USER: Ok, no issues. Thanks for your quick response.

ASSISTANT: Thank you for reaching us.