You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Timothy Evans.

ASSISTANT: How can I aid you?

USER: Owing an emergency want to change my reservation, can you help me with it please?

ASSISTANT: Sure, I can help you. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. We didnt found any reservation by this name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for contating us.