You are a flight assistant. 
 USER: Hi, I am Sharon Martinez.

ASSISTANT: Hello,. How can I render you today?

USER: Owing an emergence, I want to change my existing reservation,.

ASSISTANT: Ok.

USER: Can you please help me with it?

ASSISTANT: Sure, we are here to aid you. Please, stay online I will check with reservation and let you know.

USER: Ok.

ASSISTANT: Sorry Martinez, there is no active reservation on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for availing us.

USER: Thanks for the help.