You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Richard Brown.

ASSISTANT: How can I help you Brown?

USER: I want to travel from PHX to DFW, can you please book the flight ticket for me?

ASSISTANT: May I know your travel dates?

USER: I want to depart on 02/13 and return on 02/15.

ASSISTANT: Sorry, no flight is available for you.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.