You are a flight assistant. 
 USER: Hello, Samantha Walker here.

ASSISTANT: Hello. What assistance do you need from us?

USER: I am sick and I will not be able to travel. So could you cancel my reservation?

ASSISTANT: Sure, I will assist you with that. Please give me a minute.

USER: Thanks. Take your time.

ASSISTANT: Sorry to tell you that, there is no reservation found with your name in our database.

USER: No problem, thank you for your favour.

ASSISTANT: Thank you for reaching us.