You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kenneth Lewis here.

ASSISTANT: How can I help you today?

USER: I would like to travel from DFW to IAH for a business meeting, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I can help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please mention your preferable travel dates for booking flight ticket?

USER: Sure, I am planning to leave on 02/11 and please book my return ticket on 02/13.

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

USER: Sure, take your time.

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

USER: Oh! So sad to hear that. Anyway, thank you for the information.

ASSISTANT: You are welcome.