You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, May I know your name?

USER: I am Melissa Garcia.

ASSISTANT: How can I provide assistance to you?

USER: Owing to an emergency I want to cancel my recent reservation, can you help me?

ASSISTANT: Sure, Please wait a moment I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us, have a good day.

USER: Thanks for your help.