You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Please help me in booking my flight ticket from PHX to DFW?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travelling dates are Jan 20 and Jan 22.

ASSISTANT: Do you have any preferences?

USER: I need connecting flight with my return flight at afternoon time.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, thanks for your information.

ASSISTANT: Can I know your name?

USER: Myself Jonathan Harris.

ASSISTANT: Thank you for contacting us.