You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kevin Edwards.

ASSISTANT: How can I assist you today?

USER: I would like to change my reservation, can you please help me out?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Thank you.

ASSISTANT: I will help you with changing the reservation. Please give me a moment.

USER: Sure, thank you.

ASSISTANT: There is no reservation found under your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: Welcome, have a great day.