You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Elizabeth Williams here.

ASSISTANT: How may I assist you?

USER: Reserve a flight ticket for me that is from IAH to ORD. For my business trip to Chicago. I need a connecting flight.

ASSISTANT: May I know your travel dates?

USER: My travelling dates for journey are 12/22 to 12/24.

ASSISTANT: Do you have any specifications?

USER: I told already that I want a connecting flight.

ASSISTANT: There is no flight on your route.

USER: Not a problem.

ASSISTANT: Thank you.

USER: Thank you.