You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand?

USER: I am Carol Lewis. My family tour trip got postponed, so I want to change an existing reservation.

ASSISTANT: Ok.

USER: Could you help me in changing the reservation?

ASSISTANT: Sure, I will help you. Please wait for a moment, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.