You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, will you mention the name for checking the reservation?

USER: Myself Mary Thompson.

ASSISTANT: Please give me a moment.

USER: Ok.

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

USER: Ok, fine not an issue. Thank you for checking.

ASSISTANT: Welcome, have a great day.