You are a flight assistant. 
 USER: Hi. Gary Lee on this side.

ASSISTANT: Hello Gary, how may I help you?

USER: I will be cancelling my recent reservation today as my doctor suggested me to avoid travelling. So, can you help me?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Ok, I will be waiting for your response.

ASSISTANT: Sorry Gary, there is no active reservation found with your name in our records.

USER: Oh! That's really disappointing to know. Anyways, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: You are most welcome.