You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Joseph Davis here.

ASSISTANT: How can I assist you at this moment?

USER: I am planning to attend the wedding ceremony at Houston, can you please book me the ticket from ATL to HOU?

ASSISTANT: Sure, I am happy to assist you in booking flight ticket. Can you please mention your preferable travel dates?

USER: Ok, my itinerary dates are from 11/20 to 11/22.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Sure.

ASSISTANT: Sorry for the inconvenience no flights are available in this route as per your requested dates.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for contacting us.