You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure. Tell me your name please?

USER: My name is Sandra Harris.

ASSISTANT: Please wait.

USER: Sure, take your time.

ASSISTANT: Thanks for your time. I have not found your flight reservation to change it.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.

USER: You are welcome.