You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Christopher Jackson.

ASSISTANT: Jackson, how may I help you?

USER: Can you please book a flight ticket from JFK to IAH?

ASSISTANT: Please provide your itinerary dates.

USER: Sure, I need to travel on dates of 12/17 and 12/19.

ASSISTANT: Please hold on for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no flight is available on your route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.