You are a flight assistant. 
 USER: Hi.

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: Sure, my name is Michelle Phillips.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no previous reservation found under your name.

USER: That's ok, thank you for giving the information.

ASSISTANT: Welcome, have a great day.