You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

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

ASSISTANT: Sure, may I know your name please?

USER: My name is Thomas Taylor.

ASSISTANT: Please wait a moment I'll check the reservation list.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to cancel it.

USER: No issues, thank you for the checking.

ASSISTANT: Thank you for choosing us.