You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Patricia Thompson here. Can you book a single connecting flight ticket to Houston for my business trip?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: The airport codes are from JFK to IAH.

ASSISTANT: Can you please share your planned travel dates?

USER: My travel dates are from Dec 18 to Dec 20.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, that is not a problem.

ASSISTANT: Ok, thank you for opting us.

USER: Thank you.