You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you with today?

USER: This is Kevin Martin. I just want to change my holiday trip, could you help me to change my reservation?

ASSISTANT: Sure, I can help you with that. Please allow me a minute to check the details.

USER: Sure, please.

ASSISTANT: Meanwhile, how are you doing today?

USER: I am doing good, what about you?

ASSISTANT: Good to hear that. I am doing good, thank you for asking. Kevin, I would like to inform you that there is no reservation found under your name.

USER: Oh! that's fine. Anyway thank you for your help.

ASSISTANT: You're welcome. Thank you for contacting us. Have a great day.