You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please book me a flight ticket from HOU to BOS?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from Dec 14th to Dec 16th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want a single connection in between my journey.

ASSISTANT: Is there any specifications?

USER: I prefer a normal-cost airline. I would like to travel in economy class.

ASSISTANT: May I know your name?

USER: I am Ruth Allen.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.