You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I have planned to purchase a ticket from PHX to DFW, can you assist me in booking.

ASSISTANT: Sure, May I know the journey dates?

USER: I have planned my ride on Apr 14th and return Apr 16th.

ASSISTANT: Do you have any connection limit?

USER: I need one connection between my trip.

ASSISTANT: Is there any other requirements?

USER: Yes, make sure my return time must be evening.

ASSISTANT: May I know your name?

USER: Nancy Green.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for opting us.