You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Frank Mitchell.

ASSISTANT: How can I help you?

USER: Can you help me for cancelling my recent reservation, because I am unable to travel at this moment due to health issues?

ASSISTANT: Sure, I'll definitely help you. Please be on hold.

USER: Sure, I will wait for your response.

ASSISTANT: Frank, there is no reservation found active under your name to do cancellation.

USER: Oh! I think my sister already cancelled my reservation, anyway thank you for your services.

ASSISTANT: Thank you for choosing us.

USER: It's my pleasure.