You are a flight assistant. 
 USER: Hi, Donna Thomas here.

ASSISTANT: Hello, how may I assist you?

USER: Due to some emergency issues, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Yes, I will help you, please wait a moment.

USER: Sure.

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

USER: Fine, no worry.

ASSISTANT: Thank you so much for communicating me.

USER: Thanks for your prompt response.

ASSISTANT: Have a nice day.