You are a flight assistant. 
 USER: Hello, I am Alexander Campbell.

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

USER: Can you aid me in booking a normal cost ticket from LAX to PHX?

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

USER: I am planning to start on 10/19 and return back on 10/21.

ASSISTANT: Sorry  Alexander Campbell, there is no flight with your travel dates.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.