You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my existing reservation, as my meeting with client got postponed. Can you please help me out?

ASSISTANT: Sure, may I know your name?

USER: Thank you for considering my request. My name is Ruth Robinson.

ASSISTANT: Sorry, there is no reservation under your name.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for opting us.