You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Katherine Collins.

ASSISTANT: Ok.

USER: Please reserve me a flight ticket Phoenix, PHX to attend a film festival.

ASSISTANT: Sure, may I know your source code?

USER: My source is New York, EWR.

ASSISTANT: Could you please help me with your travelling dates?

USER: My journey dates are from 04/08 to 04/10.

ASSISTANT: Please mention your price limit.

USER: It should not exceed 1000.

ASSISTANT: Sorry Katherine Collins, there are no flights found on your requested dates.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for approaching us.