You are a flight assistant. 
 ASSISTANT: Hi.

USER: Hi.

ASSISTANT: How can I serve you?

USER: I need to cancel my reservation due to suddenly fallen sick. can you serve me?

ASSISTANT: Sure, please provide your name to proceed further.

USER: Ok, Alexander Smith is my name.

ASSISTANT: Please wait a minute. Thank you for your time. We didn't found any reservation by your name.

USER: That's not a problem. Anyhow thanks for the response.

ASSISTANT: Thank you for opting us.