You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: As my exam got postponed due to heavy storm, can you please do some changes in my existing reservation?

ASSISTANT: Sure, may I know your name?

USER: Sure, I am Virginia Davis.

ASSISTANT: Sorry, there is no reservation based on your name.

USER: Ok, not an issue. Thank you for your quick response.

ASSISTANT: Thank you for choosing us.