You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may help you today?

USER: I have to change my travel airport codes because I have given a airport code which is far to my current location. So, I need your help. Will you please help me in changing the details?

ASSISTANT: Sure, I'll help you in changing an existing reservation.

USER: Thank you.

ASSISTANT: Please let me know your name to check the reservation status.

USER: Christine Turner.

ASSISTANT: Thank you for providing your name, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no reservation found by this name.

USER: No issue, Thank you for the information.].

ASSISTANT: Thank you for approaching us.