You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Cynthia Walker.

ASSISTANT: Walker, how may I aid you?

USER: Can you help me in booking from DFW to BOS, as there is a family function?

ASSISTANT: Sure, I can book your ticket. May I know your itinerary dates?

USER: My trip dates are 11/10 to 11/12.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure.

ASSISTANT: Sorry, no flight is available on your route.

USER: No issue, thank you.

ASSISTANT: Thank you for contacting us.