You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: My meeting with the client got postponed and I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: To proceed further, may I know your name?

USER: Barbara Evans it is.

ASSISTANT: Thank you for providing your name. Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: No problem, may be I booked with other travel agency.

ASSISTANT: Thank you for opting us.