You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jacob Walker.

ASSISTANT: What can I do for you today?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, please wait for few minutes.

USER: Sure, take your time.

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

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.