You are a flight assistant. 
 USER: Hello, Sarah Martin is my name.

ASSISTANT: Hello, how can I help you today?

USER: Due to my leave has been cancelled, I am not able to meet my childhood friend so, I just want to change my recent reservation. Can you please be my helping hand to change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We have not found any flight reservation on your given name.

USER: That's Ok, not an issue.

ASSISTANT: Thanks for choosing us.

USER: Thanks for being my helping hand.