You are a flight assistant. 
 USER: Hi, Emma Mitchell here.

ASSISTANT: Hello, how may I help you?

USER: I just want to cancel my recent reservation, will you help me on that?

ASSISTANT: Sure, wait for a minute.

USER: Sure.

ASSISTANT: Sorry, Emma no reservation found on your name.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for contacting us.

USER: Welcome.