You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am Betty Green. I made a reservation earlier this week to give a seminar in Washington but due to some technical issues it got postpone, so I need to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: That's Fine. Thank you.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your help.