You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand?

USER: I am Kathleen Anderson. I want to change my reservation, due to my exam date has been changed. Can you help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check your reservation.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Not an issue, thank you for your kind information.

ASSISTANT: Thank you for approaching us.