You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Is there any help that you need from my side?

USER: I am Jack Adams. Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: I have checked but there is no reservation found for the user name in our back end to help you in cancellation process.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome and thank you for approaching us.