You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in changing my existing reservation, as my exam got postponed.

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: Sure, my name is Steven Hernandez.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thanks for approaching us.