You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, how may I help you?

USER: I want to book a direct flight ticket to attend an emergency case at CA-OAK. Can you help me?

ASSISTANT: Sure, may I know your travelling dates?

USER: 07/05 and 07/07 are my travelling dates.

ASSISTANT: Kindly provide your source code.

USER: GA-ATL will be my boarding point.

ASSISTANT: Let me know your good name.

USER: I am Ryan White.

ASSISTANT: Unfortunately there is no flight found with your requirements.

USER: No issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.