You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How shall I assist you today?

USER: Book a ticket with the name of Kevin Hernandez to Atlanta, ATL.

ASSISTANT: Sure, I am blissful to help you. Help me with your source code?

USER: Thank you. We friends were planning a tour from Oakland, OAK.

ASSISTANT: On which dates you have planned to travel?

USER: I am planning to start my journey on 07/18. And I have to back on 07/20.

ASSISTANT: Thanks for your details, there is no flight found on your desired routes.

USER: No problem, I will go with another flight. Thank you for helping me.

ASSISTANT: Thank you for availing us, have a nice day.