You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: I am Ruth Rodriguez. Can you help me booking a flight ticket from HOU to BOS?

ASSISTANT: Sure, can you please forward your journey dates?

USER: I will start on 03/15 and return on 03/17.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT:  Do you prefer connecting or direct flight?

USER: I need a break in my journey.

ASSISTANT: Is there any more preferences in your journey?

USER: I am looking for a normal cost flight.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, we are unable to provide the flights on your preferred routes matching your preferences.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.