You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Can you help me booking a flight ticket from DFW to SFO?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I will start on 03/13 and return on 03/15.

ASSISTANT: May I know your name to proceed further?

USER: I am Mark Moore.

ASSISTANT: Ok, may I know in which connection are you comfortable to travel?

USER: I need a break in my journey.

ASSISTANT: Sorry Mark Moore, there is no flight to reserve a flight in your route as per required travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.