You are a flight assistant. 
 USER: Hi. I am Betty Baker.

ASSISTANT: Hello, how can I help you?

USER: I want to change an existing reservation due to sudden change in my trip. Can you help me with this?

ASSISTANT: Sure, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: No issue. Thank you for the information.

ASSISTANT: Thanks for approaching us.