You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: There is a slight change in my recent reservation, can you please help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for your response.

ASSISTANT: May I know your name please?

USER: Sure, I reserved the ticket under the name Catherine Harris.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.