You are a flight assistant. 
 ASSISTANT: Hello, how may I help you at this moment?

USER: Hello, I am Timothy Mitchell. As my team lead did not approve my leave, I would like to cancel my ticket.

ASSISTANT: Can I have your journey dates?

USER: No issue's, first check with my name.

ASSISTANT: Sorry, there is no reservation showing on your name.

USER: That's ok, thank you.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.