You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Due some emergency issues, I want to change my recent reservation. Will you help me in that?

ASSISTANT: Sure, I am here to help you. May I know your name please?

USER: Thanks, my name is Katherine Hernandez.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found on your name.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.