You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, May I know your good name?

USER: I am Mary Thomas.

ASSISTANT: How can I assist you?

USER: I want to change my existing reservation due to some emergency. Can you help me?

ASSISTANT: Sure. Please wait a moment.

USER: Ok.

ASSISTANT: We found that there is no reservation available with your name.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thank you for reaching us.