You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Mary Mitchell.

ASSISTANT: How shall I assist you?

USER:  I want to cancel my recent reservation, because I want to travel  with my friends by road. Can you help me with it please?

ASSISTANT: Please wait for a while. I'm sorry, no reservation found by name Mary Mitchell.

USER: That's ok.

ASSISTANT: Thanks.

USER: Thank you for the response.