You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Timothy Adams.

ASSISTANT: How may I assist you?

USER: I want to travel from DEN to CLT location and it's very emergency purpose. So, I need a direct flight. Can you please check and book a ticket on 04/03 date?

ASSISTANT: Sure, when you want to return?

USER: I want a return ticket on 04/05 date.

ASSISTANT: Sorry, I am unable to find out a flight for you with your provided details.

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

ASSISTANT: Thank you for choosing us.