You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Lisa Lewis here.

ASSISTANT: How can I assist you?

USER: I want to cancel my recent reservation due to some problem, can you please help me in that?

ASSISTANT: Sure, please give me a minute.

USER: Ok, take your time.

ASSISTANT: Lisa, there is no reservation found with your details.

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for contacting us.