You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I amend you?

USER: I want to change my existing reservation due to misplace of my reservation ticket by your agent.

ASSISTANT: Ok.

USER: Can you help me with that?

ASSISTANT: Sure, I am mirthful to help you.

USER: Thank you.

ASSISTANT: Let me know your good name to check reservation.

USER:  Larry Harris here.

ASSISTANT: Please, wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: No problem. Thank you for your quick response.

ASSISTANT: Thank you for contacting us.