You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you now?

USER: I am Steven hall.

ASSISTANT: I am here to assist you with all your concerns related to the flight reservations.

USER: Thank you. Book me a flight ticket from LAX to DFW as I need to attend a singing competition in Dallas.

ASSISTANT:  Steven Hall, may I know your desired dates for this journey?

USER: Yes, I need to go on 06/12 and I will come back on 06/14.

ASSISTANT: Sorry to tell you, there are no flights currently available on your requested route.

USER: No issues, thank you.

ASSISTANT: Thank you for approaching our services. Have a nice day.