You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: owing to a big emergency at work, I can't depart on my schedule travel dates, can you please help me with changing my reservation?

ASSISTANT: Sure, please provide your name to check the reservation in the reservation list.

USER: Katherine Lopez her.

ASSISTANT: Please wait for some time, I will check with your reservation status and revert to you.

USER: Sure, take your time.

ASSISTANT: I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.