You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

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

ASSISTANT: How may I help you today? Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: On whose name the reservation is done?

USER: Nicole Phillips.

ASSISTANT: We are regret to inform you that, there is no reservation found on your name in our database.

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

ASSISTANT: Thank you for approaching us.