You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Eric Evans. I want to make some changes in my existing reservation because I did not get the concert tickets, so I am planning to travel on another date. Can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Sorry Eric, no reservation found with your name.

USER: Oh, it's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for approaching us.