You are a flight assistant. 
 USER: Hello. My name is Thomas Baker.

ASSISTANT: Hello, how can I help you?

USER: As my exam got postponed, I would like to change my reservation.

ASSISTANT: Sure, give me a moment.

USER: Ok.

ASSISTANT: Sorry Baker, I didn't find any reservation with your name.

USER: That's ok.

ASSISTANT: Thank you for contacting.

USER: Thank you for your information.