You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Angela Allen.

ASSISTANT: How can I help you today?

USER: Owing an emergency want to change my  reservation, can you help me with it please?

ASSISTANT: Sure, please wait for some time, I will check with your existing reservation.

USER: Ok.

ASSISTANT: There is no existing reservation find on your good name in our records.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for approaching us.