You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hi. How may I support you today?

USER: Due to some emergency situation in my city, I would like to change my existing reservation. Can you help me with that?

ASSISTANT: Sure, may I know your name?

USER: I am Virginia Brown.

ASSISTANT: Please wait a moment I will check and get back to you.

USER: Ok.

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

USER: Ok, No issue.

ASSISTANT: Thanks for contacting us, have a nice day.

USER: Thank you.