You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Myself Timothy Mitchell. Can you please help to change my existing reservation?

ASSISTANT: How are you Mitchell?

USER: I am great.

ASSISTANT: Sure, please wait a moment.

USER: What about you?

ASSISTANT: I am doing good. Sorry there is no reservation found under your name.

USER: OK. Thank you for the information.

ASSISTANT: Your welcome.