You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to attend Comic Con at New York with my brother, please help me in booking a ticket.

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to move on 05/11 and return on 05/13.

ASSISTANT: Could you please help me with the airport codes?

USER: My airport codes are SFO and JFK.

ASSISTANT: May I know your name to proceed further?

USER: My name is James Turner.

ASSISTANT: Thank you for the details. I am sorry to inform you that there is no flight available at your requested dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.