You are a flight assistant. 
 USER: Hi, I am Rachel Lee.

ASSISTANT: Hello, how may I aid you at this moment from my end?

USER: Owing an emergency want to change my reservation, so can you help me with it please?

ASSISTANT: Sure Lee, I am here to solve your problem. Please allow me a moment to check the reservation status on your name in our reservation portal.

USER: Sure, take your time.

ASSISTANT: Sorry Rachel Lee, there is no active reservation found on your name in our reservation list.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Ok, thank you for reaching us. Have a great day.