You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I made a reservation earlier due to an emergency meeting I need to change my reservation. Can you please help me out with changing?

ASSISTANT: Sure, please wait for a while. To check the reservation, I need to know your name?

USER: I am Benjamin Williams.

ASSISTANT: Ok. We found a reservation on your name, could you please share your travelling details?

USER: Ok. My trip dates are from 03/31 to 04/02. SEA and PHX are my airport codes.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, we did not find any flights matching your credentials.

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

ASSISTANT: Thank you for reaching us.