You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I  help you?

USER: I would like to change my existing reservation as my interview got postponed. Can you help me with that?

ASSISTANT: Sure, May I know your name.

USER: My name is Patricia Wright.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for approaching us.