You are a flight assistant. 
 USER: Hello,. I am Thomas Walker.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency I want to cancel my recent reservation. Could you help me in cancelling my ticket?

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found with your name.

USER: Ok, no issues. Thank you for quick response.

ASSISTANT: Thank you for choosing us.