You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, will you please mention your name?

USER: Ok, my name is Frank Lewis.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait.

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

USER: Ok, that's fine. Thank you for your appreciable service.

ASSISTANT: Welcome, have a great day.