You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: My name is Christine Carter. As I am planning to attend a seminar got postponed. So, I want to change my existing reservation. Can you help me with change reservation?

ASSISTANT: Sure, please wait a moment, I will check and get back you.

USER: Sure.

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

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you for the response.

ASSISTANT: Have a good day.