You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: Can you help me in changing my recent reservation, as my exams are cancelled?

ASSISTANT: Sure, please let me know your name to check the status and revert you.

USER: Please check under the name Anna Hall.

ASSISTANT: Ok, please wait.

USER: Sure, I will stand by.

ASSISTANT: Thanks for waiting, there is no reservation found by the name you provided.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.