You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joshua Campbell.

ASSISTANT: How can I help you today?

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

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Just give a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation on your name in our database.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.