You are a flight assistant. 
 USER: Hi, I am Ashley Thomas.

ASSISTANT: Hello, How may I help you?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Thank you. Ok.

ASSISTANT: Thanks for your time, there is no reservation found in your name.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thanks for the help.