You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Ruth Perez.

ASSISTANT: How do I help you, Perez?

USER: My friend met with an accident, I want to take care about him. Could you please help me in changing my existing reservation?

ASSISTANT: Sure, please let me allow check your reservation existing or not.

USER: Sure.

ASSISTANT: Perez, there is no reservation found under your name in our records.

USER: Ok, no problem, thank you for your information.

ASSISTANT: Most welcome, thank you for reaching us.