You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: Can you please be my helping hand to cancel reservation?

ASSISTANT: May I know your name ?

USER: Yes, I am Thomas Thomas.

ASSISTANT: Please wait a while I will let you know.

USER: OK.

ASSISTANT: Unfortunately , there is no reservation found.

USER: OK, no issue. Thanks for your responce.

ASSISTANT: Thank you  have a great day.