You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Carolyn Green.

ASSISTANT: How may I assist you today?

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

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thanks. My planned travelling dates are from 01/07 to 01/09.

ASSISTANT: Ok, please hold on for a while.

USER: Ok, take your time.

ASSISTANT: There is a flight with connection 1 and price 300, can I proceed with this flight?

USER: Can you please check for a flight within the range of 200?

ASSISTANT: Sorry, there are no flights found.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.