You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Brenda Garcia, want to cancel my recent reservation due to some personal problem. Please help me out with that.

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: It's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.