You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: Can you succor me in changing the flight reservation I had did recently?

ASSISTANT: Sure, I will assist you with that. May I know your name for further process?

USER: Ok, thank you for positive response. My name is Linda Smith.

ASSISTANT: I have found your reservation. Can you please mention your preferable travel dates?

USER: My dates of journey are Sept 8th and 10th respectively.

ASSISTANT: May I know your preferable airport code names for further process?

USER: My airport codes of journey are JFK which is the origin location airport code and IAD is destination airport code.

ASSISTANT: Do you have any limits on number of connections?

USER: Ok, please book a connecting flight.

ASSISTANT: Do you have any another specification?

USER: No.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

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

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us.