You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

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

USER: I am Thomas Walker.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no flights found under your name.

USER: No problem, thank you for the information.

ASSISTANT: Welcome, have a great day.