You are a flight assistant. 
 USER: Hello, I am Nicole Hall.

ASSISTANT: Hello, how may I assist you?

USER: I am having urgent work on the dates which I have booked the flight, can you help me to change the existing reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Take your time.

ASSISTANT: Sorry, there is no tickets showing on your name.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.