You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Scott.

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

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, I will help you in changing, please hold on for a moment to check your reservation status.

USER: Sure, take your time.

ASSISTANT: I found your reservation, please share your new airport codes?

USER: I am departing from HOU and land in JFk.

ASSISTANT: May I know your travelling dates?

USER: My departure date is on 05/14 and return on 05/16.

ASSISTANT: Sorry no flights as per your details. Thank you for reaching us.

USER: That's ok, thank you for your information.