You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER:  Owing to an emergency, I want to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please help me with your name.

USER: Ashley Walker.

ASSISTANT: I am really sorry to inform you that there is no booking found on your name.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us. Have a great time.