You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I help you?

USER: I made a reservation earlier to attend client meeting unfortunately, meeting held through skype. So, I want to change my existing reservation.

ASSISTANT: Ok, I can help you to change your reservation. May I know your name to check the status?

USER: My name is Ryan Roberts.

ASSISTANT: Ok, please wait a while. I will revert you.

USER: Ok.

ASSISTANT: Thanks for your time. There was no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for consulting us.

USER: Thank you.