You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Dorothy Anderson.

ASSISTANT: How can I assist you Dorothy?

USER: I have an important meeting in Denver, so I need a flight ticket to go there. Can you please search a flight for me from New York?

ASSISTANT: Sure, please mention your planned travel dates.

USER: My preferable dates are from 03/02 to 03/04.

ASSISTANT: May I know your airport codes please?

USER: My source airport code is EWR and my destination airport code is DEN.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry Dorothy, there is no flight available on your route.

USER: That's so sad to hear.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your time.