You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I render you today?

USER: I want to cancel my recent reservation due to sudden postpone of my client meeting.

ASSISTANT: Ok.

USER: Can you help me with that?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: To check with the reservation I need your name.

USER: David Perez here.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thank you for your quick service.