You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Dennis Martinez here.

ASSISTANT: How may I serve you at this moment?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, please wait for few minutes.

USER: Ok.

ASSISTANT: There is no recent reservation found on your name in our records.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.