You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name?

USER: I am Jennifer Mitchell.

ASSISTANT: How can I aid you?

USER: Due to an emergency, I want to change my reservation. Can you help me?

ASSISTANT: Ok. Please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, There is no reservation found on your name.

USER: No problem, Thank you.

ASSISTANT: Thanks for choosing us.