You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me to cancel the previous ticket? Because the meeting got cancelled suddenly.

ASSISTANT: Sure, I will help you with that.

USER: I am happy for your response.

ASSISTANT: Let me know your name to check your reservation?

USER: Sure, my name is Jonathan Baker.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting. I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: It's ok, not a problem with that. Thank you.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.