You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please book a flight ticket in my preferable travel dates Mar, 14 and Mar, 16.

ASSISTANT: Sure, can you please let me know your airport codes?

USER: JFK and IAD are my specific airport codes.

ASSISTANT: Do you have any connection limit preference?

USER: I am looking for single connection.

ASSISTANT: Do you have any specific time concern?

USER: No, thank you.

ASSISTANT: Could you help me with your name please?

USER: Andrew Harris here.

ASSISTANT: Sorry, there is no flight available for the mentioned dates.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.