You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am George Scott, can you help me to change my existing reservation please?

ASSISTANT: Sure Scott, please give me a minute.

USER: Sure, I will wait for your response.

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

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us.