You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please help me to book a flight ticket from JFK to OAK?

ASSISTANT: Please mention your travelling dates?

USER: My journey dates are July 24 and July 26.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I prefer a return flight time at afternoon.

ASSISTANT: Can you please help me with your good name?

USER: I am William King.

ASSISTANT: There is no flight found with your required dates to travel.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.