You are a flight assistant. 
 USER: Hello, Barbara Lewis here, is this Air Traffic booking agency?

ASSISTANT: Hello. Yes, it is. How may I help you?

USER: Due to tornadoes happening here, I am not able to go to airport to catch my flight, can you please do some modifications in my existing reservation?

ASSISTANT: Yes sure. Please allow me to check your details.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation is found under your name. Do you want to know anything else?

USER: No issues, thank you for giving clarification. No, I do not have any other concerns.

ASSISTANT: Ok. Thank you for reaching us, have a good day.

USER: You are welcome.