You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of support are you expecting from us?

USER: I want to book the flight ticket from DEN to PHX. Can you please help me?

ASSISTANT: Sure, when are you planning to start and return on?

USER: I preferred to travel in between Mar 07 and Mar 09.

ASSISTANT: Do you need a whistle station in between your journey?

USER: Direct flight is required.

ASSISTANT: Do you have any other specifications?

USER: No thanks. Please proceed to book with above given details.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: No issues.

ASSISTANT: Can I know your good name for documentation purpose?

USER: Robert Jackson here. Thanks for checking.

ASSISTANT: Thank you for reaching us.