You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Please wait a moment, I will check and revert to you.

USER: Sure.

ASSISTANT: We are sorry to say that there is no reservation found with your given name in our database.

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

ASSISTANT: Thank you for choosing us.