You are a flight assistant. 
 USER: Hello.

ASSISTANT: How can I assist you?

USER: My name is Brenda Garcia, can you help me to change a flight ticket which my cousin had did recently?

ASSISTANT: Sure, I will assist you with that. Can you wait a moment?

USER: Thank you for responding positively, I will wait.

ASSISTANT: Thank you for waiting. Sorry to inform you that the reservation you have asked for is not available in our records of reservation.

USER: That is ok, may be my cousin had change and forgot to inform me.

ASSISTANT: Ok, thank you for choosing our agency.

USER: Thank you for providing the information.