You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, please provide your travelling dates.

USER: My travelling dates are Aug 18 and 20.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Ok, May I know your connection limit?

USER: I need a way station in my journey.

ASSISTANT: Ok, Do you have any other preferences?

USER: No.

ASSISTANT: Thank you for your time, There were no flights found with your given details.

USER: Ok, thank you.

ASSISTANT: May I know your name?

USER: Sure, Margaret Lopez here.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your kind service.