You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samuel Carter here.

ASSISTANT: Samuel Carter, how may I render you?

USER: Can you please check with my previously reserved ticket with your agency.

ASSISTANT: Sure.

USER: As I need to cancel it because of my office work.

ASSISTANT: Please give me a moment to check your ticket status.

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

ASSISTANT: Sorry, no reservation is available by your name.

USER: Oh! That's fine. Thank you for checking anyways.

ASSISTANT: Thank you for reaching us.

USER: You are most welcome.