You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I render you at this moment?

USER: Can you help me to change my reservation to next week?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Stephanie Brown.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok.

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

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.