You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I have planned to consult a doctor for monthly check up due to more emergency operations scheduled to him my appointment has been changed. Will you help me in changing my existing reservation?

ASSISTANT: Sure, please share me your name?

USER: My name is Kimberly Young.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: There is no reservation with your name.

USER: Ok, no worries at all.

ASSISTANT: Thank you for reaching us.

USER: Thank you.