You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Johnson here.

ASSISTANT: How may I help you?

USER: Can you please help me in booking the ticket from ATL to HOU? As I have to attend an interview.

ASSISTANT: Ok, may I know your planned dates of your journey?

USER: Sure, my planned travel dates are 10/29 and 10/31.

ASSISTANT: Sorry to say, there is no flight available on your route to book your ticket.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thanks for approaching us.