You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Miller.

ASSISTANT: Miller, how may I help you?

USER: I would like to cancel my recent reservation due to financial issues, can you help me?

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

USER: Ok, take your time.

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

USER: That's fine, no problem. Thank you for your service.

ASSISTANT: Thank you for contacting us.