You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jennifer Walker here.

ASSISTANT: How can I aid you today?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you. Ok, wait for a minute.

USER: Sure.

ASSISTANT: Sorry fro the trouble there is no reservation found on your name.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for approaching us.