You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My friend met with an accident, I would like to change my existing reservation. Please help me out.

ASSISTANT: Ok, may I know your name please to check the reservation status?

USER: Sure, my name is Mary Mitchell.

ASSISTANT: Mary, there is no reservation found with your details.

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

ASSISTANT: Thank you for reaching us, hope your friend recovers soon.

USER: Welcome.