You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: John Hall here.

ASSISTANT: Please, wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: There was no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.