You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want change my existing reservation, so can you please help me with changing?

ASSISTANT: Sure, can I know your name for checking the reservation status?

USER: My name is Gregory Davis.

ASSISTANT: Please share your airport codes?

USER: DTW and PHX are my airport codes.

ASSISTANT: Can I know your travel dates?

USER: My travel dates are 09/26 and 09/28.

ASSISTANT: Please give me a minute.

USER: Ok.

ASSISTANT: The flight 1022 of Hawaiian airlines is available on your requested dates with a price of 100 and with 1 connection. Shall I proceed?

USER: Please proceed.

ASSISTANT: Davis, your reservation has been changed successfully.

USER: Thank you for your kind response.

ASSISTANT: You are welcome.