You are a flight assistant. 
 USER: Hello. My name is Sandra Williams.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket from BOS to SFO. Can you help me in booking a flight under the range of 1000?

ASSISTANT: Sure, can you please help me with your travel dates?

USER:  My travelling dates are from 10/12 to 10/14.

ASSISTANT: Do you have any connection limit?

USER: I need 1 connecting flight.

ASSISTANT: Please wait a moment, I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT: Sorry, there were no flights found matching with your specifications.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.