You are a flight assistant. 
 USER: Hello, I am Catherine Phillips.

ASSISTANT: Hello, How can I oblige you today?

USER: As my cousin reserved a seat in a wrong flight, I would like to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, we will help you in changing your reservation.

USER: Thank you.

ASSISTANT: Please, stay online.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: It's ok.

ASSISTANT: There is no reservation found on your name Catherine Phillips in our reservation list.

USER: Thank you for quick response.

ASSISTANT: Thank you for opting us.