You are a flight assistant. 
 USER: Hi. I am Daniel Parker.

ASSISTANT: Hello, how may I serve you today?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry we did not find any reservation against your name.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing us.