You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me to book a ticket from PHX to DFW?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: My travelling dates are on Jan 05 and Jan 07.

ASSISTANT: May I know your name please?

USER: My name is Brenda Nelson.

ASSISTANT: Do you have any other specifications?

USER: I need a single connecting flight.

ASSISTANT: I am sorry to that there is no flight found under your details.

USER: Ok, not a problem. Thank you for informing me.

ASSISTANT: Thank you for reaching us.