You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Is there any help that you need from my end?

USER: Can you help me to change my reservation which is done by my friend recently?

ASSISTANT: Sure, To change your reservation we need your good name. Can you please provide it?

USER: Ok, please check for name Kevin Williams.

ASSISTANT: Sure, please wait for few minutes.

USER: Ok, I wait a moment.

ASSISTANT: Sorry Kevin Williams, we could not find any exiting reservation on your name in our records to change it.

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

ASSISTANT: Thank you for reaching us.