You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jeffrey Clark.

ASSISTANT: How can I serve you today?

USER: Will you please change my existing reservation? Because I would like to change my business to another place.

ASSISTANT: Sure, I will help you. Please wait for few minutes.

USER: Sure.

ASSISTANT: There is no existing reservation find on your name in our records.

USER: Ok. Thank you for sharing the information.

ASSISTANT: Thank you for approaching us.