You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I have reserved a ticket earlier but due to busy schedule I would like to change my reservation. Can you help me with that?

ASSISTANT: Sure, may I know your good name to check the reservation?

USER: My name is Ryan Green.

ASSISTANT: Please wait for a moment, I will check and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you.