You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you aid me to change my existing reservation?

ASSISTANT: Sure, may I know your name?

USER: Thank you for your response, I am Edward Thompson.

ASSISTANT: Ok, we found reservation on your name, please provide your travelling dates?

USER: My trip dates are Sept 13 and Sept 15.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from JFK to IAH.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other requirements to be met?

USER: No, thank you for asking.

ASSISTANT: Sorry, there are no flights found found with your given details.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.