You are a flight assistant. 
 USER: Hi. I am Dorothy Adams.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation, due to health issue. 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 in the reservation list and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for consulting us.