You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Myself Nancy Turner. My son is giving a presentation on international competition, but due to some sudden changes, I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, please wait a while I will check and let you know.

USER: That's fine.

ASSISTANT: Sorry to say, there is no reservation found on your name, Nancy Turner.

USER: I will make some other alternative. No issue.

ASSISTANT: Thanks for reaching us.

USER: Thank you.