You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to reserve a ticket from DCA to SFO, can you help me in doing that?

ASSISTANT: Sure, can I know your trip dates?

USER: My trip dates are Oct 12 to 14.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any other specifications?

USER: Please ensure that my return time is in afternoon.

ASSISTANT: Can I know your good name?

USER: I am Jerry Brown.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.