You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Joseph Nelson. I need to book a ticket to attend the meeting in Denver DEN. Could you please help me in booking a ticket from IAH?

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are 01/29 and return on 01/31.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a connection.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry there is no flight found on single connection.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for reaching us, have a nice day.