You are a flight assistant. 
 USER: Hi, I am Ruth Clark.

ASSISTANT: Hello, how may I oblige you today?

USER: Could you be my helping hand in changing my existing reservation?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Please wait, I will check and revert to you.

USER: Ok.

ASSISTANT: I regret that there is no reservation found on your name.

USER: Not an issue, thank you.

ASSISTANT: Thanks for reaching us, have a nice day.