You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Could you please book a flight ticket from OAK to IAD?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My trip dates are Aug 16 and Aug 18.

ASSISTANT: Do you need any break in between journey?

USER: I need a single connecting flight.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Can I know your name for booking your flight ticket?

USER: I am Christine White.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.