You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like you to make my flight reservation from DEN to IAH, can you please help me out?

ASSISTANT: Sure, can you help me with your trip dates?

USER: Thank you. I will depart on Aug 20th and return back on Aug 22nd.

ASSISTANT: Do you need any connections?

USER: Yes, I prefer for a single connection.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Dorothy Moore.

ASSISTANT: Sorry, there is no flight found with your details.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.