You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Karen Garcia.

ASSISTANT: How may I serve you for the day?

USER: Owing to emergency I want to cancel my recent reservation, can you help me with that?

ASSISTANT: Sure, we are happy to help you. Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there is no active reservation on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.