You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Owning to an emergency I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, may I know your name?

USER: Sure, I am Brenda Allen.

ASSISTANT: Give me a minute for checking.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.