You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I provide assistance to you?

USER: As my leaves are not assigned, I need to cancel my reservation. Can you help me out?

ASSISTANT: Sure, I am mirthful to help you.

USER: Thank you.

ASSISTANT: May I know your good name to check reservation?

USER: Sure, my name is Joseph Green.

ASSISTANT: Give me a moment to check your reservation.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, there is no reservation available with your specified name.

USER: No worries. Thank you for your information.

ASSISTANT: Thank you for availing us.