You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Actually I have planned to attend the client meeting but due to some technical issues the meeting has been postponed. Can you please change my existing reservation?

ASSISTANT: Sure. Can you please share me your good name please to check the reservation list.

USER: Donald Harris is my name.

ASSISTANT: Thanks for providing your name, please wait a moment, I will check and get back to you?

USER: Sure, I will wait.

ASSISTANT: There is no reservation on your name.

USER: That's not an issue.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your assistance.