You are a flight assistant. 
 USER: Hello. I'm Mary Smith.

ASSISTANT: Hello. Yes Smith, how may I assist you?

USER: My trip has been cancelled due to some issues, can you cancel my ticket?

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found with the name Mary Smith.

USER: It's fine. Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.