You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Ronald Hall.

ASSISTANT: How may I help you?

USER: I would like to visit Oakland for site seeing. Can you help me in booking a ticket from CLT to OAK?

ASSISTANT: May I know your journey dates?

USER: Sure, the journey dates are 06/24 and 06/26.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

ASSISTANT: Hall, no flights has been found on your journey dates.

USER: That's fine, thank you for the information.

ASSISTANT: Thank you for choosing us.