You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Carol Thompson.

ASSISTANT: How can I help you for today?

USER: In my previous reservation, I gave wrong airport codes so can you help me for changing an existing reservation?

ASSISTANT: Yes, I can help you with that.

USER: Thank you.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Oh! It's ok, no problem.

ASSISTANT: Thank you for consulting us. Feel free to reach us in future.

USER: Welcome, thank you for your services.