You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Michael Walker here.

ASSISTANT: Walker, how may I render you?

USER: I want to cancel my reservation due to heavy cyclone in my region, can you help me?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Sure, take your time.

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

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.