You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Brian Hall from Los Angeles.

ASSISTANT: Nice meeting you Hall.

USER: I would like to visit Dallas next month, can you please help me in booking flight ticket?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your planned dates of travelling?

USER: Thank you, I want to take off on 01/15 and book my return ticket also on 01/17.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: I want to fly from LAX and destination airport is DFW.

ASSISTANT: Please wait a moment to check the flights availability and I will revert back to you.

USER: Ok.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with your planned dates of travelling.

USER: Oh! It's ok no problem, I will go with another airline. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.