You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Owing to an emergency, I would like to change my existing reservation. Will you help me in that?

ASSISTANT: Sure, I will help you.

USER: Thanks.

ASSISTANT: May I know your name?

USER: My name is Pamela Allen.

ASSISTANT: Pamela Allen, there is no reservation on your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you so much for choosing us.