You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Michelle Garcia, I would like to change my reservation which was done earlier, will you help me with that?

ASSISTANT: Sure, I can help you in that. Please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Garcia, there is no reservation found under your name to do changes in that.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.