You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name please?

USER: I am Nancy Rodriguez.

ASSISTANT: How may I help you today?

USER: Unfortunately I have an emergency meeting so, I want to change my reservation, can you please help me in changing my reservation?

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Please wait a moment, let me check the reservation list and I will get back to you with the status.

USER: Ok, I will wait.

ASSISTANT: Thank you for being patience. We are sorry, that there is no active reservation found in your given name.

USER: Ok, no issues. Thank your for your response.

ASSISTANT: Thank you for reaching us. Have a nice day.