You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today at this moment?

USER: Could you please book a flight ticket from PHX to DFW?

ASSISTANT: Sure, to book a ticket can I know when you are willing to travel?

USER: I want to travel on Oct 25 and return on Oct 27.

ASSISTANT: Let me know your connection limit.

USER: I need a direct flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: Not a problem, thank you for the information.

ASSISTANT: Can you please share me your name?

USER: My name is Timothy Martin.

ASSISTANT: Thank you.