You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Due to some urgent client meeting, I am going to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: Myself Betty Edwards.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

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

USER: Not a big problem, Anyway thank you very much for your service.

ASSISTANT: Thank you for opting us.