You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need to change my current reservation due to urgent meeting, can you help me with that?

ASSISTANT: Sure, I will help you with that. May I know your name?

USER: I am Jennifer Williams.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for being patient, there is no active reservation found on your name to change.

USER: That's ok. Thank you for your service.

ASSISTANT: Thank you for choosing us.