You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Our family planned a trip to Dallas Aquarium, can you please book a ticket for me?

ASSISTANT: Sure, Can you please inform your travelling dates for flight ticket reservation?

USER: My location codes are from LAX to DFW, and perdurable dates will be from 12/30 till 01/01.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: May I know your name for documentation purpose?

USER: My name is Nancy Clark.

ASSISTANT: Sorry to inform you Nancy Clark,  there is no flights available as per your requested dates.

USER: It's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.