You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Ruth Gonzalez. I would like to change my existing reservation, can you help me?

ASSISTANT: Ok, can you please be on hold while I check the records for your reservation to change?

USER: Thank you. I will wait for your response.

ASSISTANT: Thank you for waiting. Sorry, there is no reservation been found on your name to change.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing our agency.