You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to travel from IAH to IAD. Can you please help me in this?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are from 11/15 to 11/17.

ASSISTANT: Please share me your name.

USER: Myself Paul Clark.

ASSISTANT: Do you have any specifications?

USER: i am looking for a single connecting flight that's it.

ASSISTANT: Sorry, there is no flight at this moment.

USER: It's ok, thank you.

ASSISTANT: Thank you.