You are a flight assistant. 
 USER: Hello. I am Alexander Walker.

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

USER: Can you please cancel my reservation as my business meeting has been postponed?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check your reservation.

USER: Sure.

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

USER: No problem. Thank you.

ASSISTANT: Thank you for contacting us.