You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Carol Wright here. I want to reserve a ticket from PHX to DFW, can you help me in doing that?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: My travelling dates are Jan 01 to 03.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Ok, may I know your arrival and departure time?

USER: My return time is in evening.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome, have a nice day.