You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jacob Lopez.

ASSISTANT: Jacob, how may I help you?

USER: My exam got cancelled in this week, can you help me to cancel my reservation?

ASSISTANT: Sure, please give me a moment to check.

USER: Please check my details.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's fine, not an issue. Thank you for your help.

ASSISTANT: Thank you for contacting us.