You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Thompson.

ASSISTANT: How may I help you?

USER: I am planning to change my recent reservation to some other dates, can you please assist me?

ASSISTANT: Yes, I can assist you.

USER: Ok, thank you.

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

USER: That's ok, not a problem thank you.

ASSISTANT: Thank you for contacting us.