You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Jack Johnson.

ASSISTANT: Jack, how can I assist you?

USER: I want to extend my journey for two days.

ASSISTANT: Ok.

USER: So, can you please help me in changing my recent reservation?

ASSISTANT: Sorry, no reservation found by your name.

USER: That's ok, thank you for providing me the information.

ASSISTANT: Thank you for contacting us.