You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Amanda Collins. I would like to visit Houston for a business meeting, so I am searching for a flight with 0 connection.

ASSISTANT: Ok, can you please help me with airport codes?

USER: I would like to travel from IAD to IAH.

ASSISTANT: Ok, when you are planning to travel?

USER: My preferable dates to travel are from 10/16 to 10/18.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to tell you, there are no flights having a connection limit 0 in this route.

USER: That's fine.

ASSISTANT: Thank you for consulting us.

USER: Thank you for your time.

ASSISTANT: You are welcome.