You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Laura Baker.

ASSISTANT: How can I help you?

USER: I am requesting you to change my trip dates in my recent reservation, which I have reserved in advance?

ASSISTANT: Sure, please be on hold. There is no reservation found under your name to do changes in that.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.