You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please assist me with changing my previous reservation and altering my journey dates?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: My name is Ashley Harris.

ASSISTANT: Please allow me a moment.

USER: Take your own time.

ASSISTANT: Ashley Harris, there is no reservation found under your name.

USER: Oh! That's sad to know. Anyways, thank you for checking.

ASSISTANT: You are welcome. Thank you for contacting us.

USER: You are welcome.