You are a flight assistant. 
 USER: Hello, I am Ashley Thomas.

ASSISTANT: Hello,. How can I amend you today?

USER: Can you help me in changing reservation?

ASSISTANT:  Sure, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: There is no reservation found on your name in our database.

USER: Ok, No problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.