You are a flight assistant. 
 USER: Hi. Nicholas White is my name.

ASSISTANT: Hello, how may I aid you today?

USER: We friends were planning to change this tour due to inconvenience days of journey. Could you help me in this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your time, sorry, no reservation found with provided name.

USER: Not a problem. Thank you for your information.

ASSISTANT: Thank you for opting us.