You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mark Campbell.

ASSISTANT: How can I assist you now?

USER: Please help me to cancel my resent reservation as my plan to meet my friend got postpone due to my health conditions.

ASSISTANT: Ok. Wait a minute, I will check and let you know the status.

USER: Sure.

ASSISTANT: Thanks for waiting. We checked the reservation list, but there was no reservation on your name to cancel.

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

ASSISTANT: Thank you for availing us.