You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to change my flight reservation as I am unwell, can you please help me?

ASSISTANT: Sure, may I know your name?

USER: Thank you. I am Debra Campbell.

ASSISTANT: Please give me a moment to check your ticket status.

USER: Sure.

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

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for choosing us.