You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: As my basketball match got postponed, can you please help me in changing my existing reservation to Minneapolis?

ASSISTANT: Sure, may I know your name to check in our portal?

USER: My previous reservation has done with the name Ryan Martin.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry, no reservation found in our portal with your name.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for contacting us.