You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Brandon Martinez. Can you help me in flight ticket booking?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: I will start on 01/23 and return on 01/25.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My airport codes are BOS to LGA.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route.

USER: No problem, thank you for your information.

ASSISTANT: Welcome, have a nice day.