You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I assist you today?

USER: I'm planning to go for OAK to meet my friend in surprise water park, can you please book my ticket from DEN?

ASSISTANT: Sure, I will help you. Can you forward your travelling dates?

USER: My trip dates are 05/30 and 06/01.

ASSISTANT: May I know your name?

USER: Myself Jack Collins.

ASSISTANT: There is no flight found with your specified dates. Thank you for opting us.

USER: Thank you.