You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my reservation, as my business meeting has been postponed. Can you please help me with that?

ASSISTANT: Sure, we are here to help you. May I know your good name please?

USER: Sure, my name is Jennifer Miller.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.