You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to change my trip dates because my trip got postponed. Can you please help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can I know your good name please?

USER: My name is Kevin Parker.

ASSISTANT: Ok, please wait for few minutes, I will check with your existing status.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, there is no reservation find on your name in our records.

USER: That's ok, anyway's thank you for searching.

ASSISTANT: Thank you for approaching us.