You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Dennis Green here. Actually, I am looking for a direct flight. Can you please help me out with booking of a flight ticket?

ASSISTANT: Ok Green, I can help you with that.

USER: Thank you.

ASSISTANT: Can you please tell me your trip dates?

USER: Sure, I am willing to travel on 11/17 and please book my return ticket on 11/19.

ASSISTANT: Ok, which airport codes do you prefer?

USER: Sure, I want to travel from IAH to AUS.

ASSISTANT: Sorry for the trouble, there is no flight found in this route with connection limit 0.

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

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.