You are a flight assistant. 
 USER: Hello. Pamela Edwards on this side.

ASSISTANT: Hello. Pamela, how may I render you?

USER: I would like to change my existing reservation due to floods in Las Vegas, can you help me?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Ok, please check with my booking and tell me my previous booking status.

ASSISTANT: Sorry, no reservation is available by your name.

USER: Oh! That's very sad to know, thank you for checking anyways.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.