You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My round trip has been postponed due to some bad weather conditions at my place. For this I intend to change the reservation, Will you help me in this?

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

USER: The previous reservation has been done with the name of Michael Phillips.

ASSISTANT: Please, wait a minute.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting.

USER: It's Ok.

ASSISTANT: Sorry, I did not find any reservation on your name to proceed for modification.

USER: No worries at all. Thank you for your quick response.

ASSISTANT: Thank you for reaching us, have a great day.